What are childhood home dreams about?

I woke up in my parents bedroom in my childhood home in Sweden, I sit up and see that my whole family is sleeping in the same bed. My parents and my two little sisters.
I feel like I've experienced this before. I'm sitting on the edge of the bed and turns around and whispered to my mom "what date is it?" My mother answers with a sleepy voice "May 10th.." I ask her right back "what year is it?" She gets annoyed and says 2007.
I have no idea what's happening. I just remembered falling asleep in my bed in Los Angeles May 26 2019.
I'm just accepting the fact that my life has started over from this point.

I'm standing up and tell my mother that I'm going to bed in my own room.
I'm open the door that leads into the kitchen.
It's dark outside and most of the lights in the house is turned off. There is just some light that makes it possible to see where I'm going.
As soon as I'm stepping out into the kitchen I hear the sound of paws on the living room floor.
I feel how my eyes is watering when I understand that our old German shepherd was alive at this time. I'm falling down to my knees and started to cry out of happiness when I see the dog. I start to pet him and tell him that I've missed him.

One of my sisters and my mother comes up to me and quietly and annoyed asks me what's wrong with me.
I look at them both with tears in my eyes and with both of my hands holding the dog. I'm trying to come up with a way of explaining to them that my life has jumped back 12 years in time.

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I dream very often and remember most of them in detail but this one stood out so much from the rest that I decided to make it my first dream post on Reddit.

A LONG read....
A little background to hopefully give perspective...
Me, (38M) married, no children despite wanting to have some. Wife (35F) is incapable, something unknown at time of marriage. SIL (26F) moved in 3 months ago with her daughter, which I have been stand in father for. These last three months have been the happiest of my life, as I finally get to be a father in some sense, and I'm really good at it.
For reasons beyond my control, I've developed romantic feelings for SIL and on Saturday night at a group outing, we had too much to drink and told her. 🤦‍♂️ She told me that she doesn't feel the same way, but is attracted to me physically, but we agreed that nothing is going to come of it, and to bury it. Yesterday was the most anxious and guilt ridden day of my life, I couldn't keep anything down all day and after many awkward exchanges with SIL, I went to sleep.

THE DREAM....

I was in a house, I didn't recognize it, but when I turned on the lights, they would flicker and go in and out. My dad who is a master electrician appeared and told me that we needed to get into the attic and have a look, so we did. When I was I'm the attic, dad began to point out that all the wiring was cut and damaged.
When I said that I could start trying to splice them back together my Grandfather, who passed away in 2004 appeared at the bottom of the attic stairs and told me that it wouldn't work, and that I had to rewire my house. My Dad agreed and I sat there looking around, then a door appeared that exited up through the roof. It had no handle, only a deadbolt style lock. When I asked where it went, my grandfather said it was the reset door and that only I could open it.
My Dad warned me that of I did, everything below would pass through it, but not everything would come out on the other side.
A small stairway appeared leading to the door and when to it, when I touched the door, I heard it unlock and I passed through it.
Everything went bright white and I was in a park that is near my childhood home. I was sitting on a bench and there were people enjoying the day. A man I didn't recognize walked up and sat next to me on the bench. He asked me to look over towards the playground and I saw a seemingly more mature, yet far healthier and younger looking version of myself playing with three children. Two boys and a little girl. All <10 years old. I asked the man on the bench who it was and he said it was me, but happy. I asked him how long it was going to be for me to become him and the man told me that I'll never be him. That my chance for that life has passed and that where I am is where I will always be. I woke up and now I can't get the sound of the man's voice or his words out of my head.

I'm suffering a lot with all of this, and I have nobody that I can confide in with this in RL that won't pass judgement.

Both my sister and I moved from our home state. We both live in the South now, but in different states.

Our dream took place at our childhood home, a big horse farm. We were all outside finishing up feeding the horses. My sister asked if she could close up the barn, and I said yes. I just needed to put a horse in a pasture.

I noticed that a bunch of Amish-looking people parachuted into the pastures I was walking toward. They seemed to be landing and walking away from the farm, so I didn’t think anything of it.

The mare, J, was roaming freely. I was going to put her in a pasture with another horse, F. J and I would meet up on different sides of the gate. I had to walk through one pasture to get to the pasture J would go into. As I approached, I saw a bear fighting with the F. I called F and she came. I got the gate closed in time, but when I turned around, somebody knocked me out.

My sister remembers walking into the house and downstairs to her bedroom. She heard a lot of noise and my dad yelling at someone and the phrase, “Put the gun down.” My sister was scared so she waited downstairs until everything quieted down.

When she went upstairs, my parents told my sister that I was gone and they were filing a missing persons report.

***

How do two people have the same dream, and actively participate in different scenes? We woke up at the same time. She texted me right after I woke up. It was really unnerving.

I have an undiagnosed disability that causes outbursts. Now I can control them to some extent, but I've hurt people, even those I've loved dearly during them.

I was lost in somewhere based on my childhood home (where I was living with my abusive dad, was bullied and excluded from neighbors' kids and discriminated for because it's in a rich neighborhood). I exclusively searched for a small shop that sells bags (it was named something really generic but I don't remember the name). A teenage orphan was operating it, but I'll learn later that he has no parents.

Timeskip. The guy is now walking me condescendingly and trying to search my parents with me. I feel so ashamed and infatuated and my disability flares up, like it does IRL with bulit up stress. (Think Mob Psycho 100)

Timeskip again. I hurt the guy and another minor. My mom assisted them to the hospital but they died there since they don't have parents (most likely because medical treatment requires parental consent). My mom is very pissed. I yell at her "You only care about to those poor kids!" and plan to suicide out of guilt, despite being very afraid. I think that my victims did not want to die either and were also afraid o convince myself to suicide.

I wake up before suiciding. The dream feels very real so I ask my mom if I ever killed someone in the morning.

Jumping right into the dream, I find myself outside near my childhood house(located in northern Pennsylvania, very woodsy and vegetative as in real life), walking along a familiar narrow path, but this path is now heavily flooded on both sides, and teeming with shallow aquatic vegetation. I encounter a snake of which I have no previous regarded interest or experience encountering before - a vietnamese Rhinocerous Ratsnake. It's almost anatomically perfect (having researched the species shortly after waking) except for it being the size of a python. It lies there in the flooded vegetation having eaten it's own tail, and presumably has been dead for some time. I feel relatively uneasy and quickly move along from fear of it coming alive or encountering more. I then come across two more that are well camoflaged, but nonthreatening, for it was me that was imposing into their territory. They seemed aware of my presence and wary, but it was just two oversized Ratsnakes accompanying each other, lying still along the flood-bank with noses touching. This was my last instance before waking up. I've tried to interpret this for some time today, but it's difficult. Any further interpretation is welcome.