So much possibilities, it just could be because I am overthinking about one or several subjects in the same time, and I dream about them without any explanations. Or maybe it's our intuition who wants to give some hints about some events, and it happens when we are vulnerable and unconscious. I really don't know why it happens, or why we can have the déjà vu sense.
I believe about the good and bad energies too.
When I was 19 I was dreaming that I will leaving my ex place to another. In fact, I was returning in my first house ( I traveled a lot). I was seeing myself siting on the bed in my first house, but that was all, the moment was already switching. And it was really significant for me, until my 21 where we moved on with my mother and sister. And I was so shocked when she announced me we were leaving to live there again at that time. Because even if the house had some modifications by the ancient owners, my room actually was exactly the same in my dreams. Same paint colors, same planks... it was some years ago now, but I was wondering if I was crazy at that time. And I am sure it wasn't just an impression of déjà vu. I really dreamed this little part some seconds.
I never thought it will happen firstly, so when I learned we would move on again, it was already surprising. But to see the same decors in my room two years ago was impressionable.