This has happened to me almost all of my life and I've thought of every explanation possible on my own. I get this strange sense of deja vu - I think I might have been having dreams of these happenings. I'm sorry if I'm not making any sense, because my conversations tend to become disconnected, I think that's the word. Before the deja vu hits me I sort of blank out, and then whatever it is happens and I KNOW I've seen it before. The best example I can think of right now is from middle school. When I was in eighth grade I had a dream of a girl in similar appearance to me, and in that dream I was in high school. She told me she was scared because the police had shown up- something about a train and someone getting into an accident. A year later in Freshman year, I'm in my Global Connections and I became friends with this girl. And about a month later after we became friends, she showed up to school and she seemed pretty freaked out so I asked what was wrong. She told me about what had happened to her and it matched that dream I had. After that I don't remember the rest of that day, but I remember getting tired and unfocused afterwards. That was what sort of alerted me to whatever this is.
Another time was just today when I was at a camping store. I was sluggish when I normally have a lot of energy and I was just feeling really tired when my little cousin and my little sister both started to play in front of me. Then, I got hit with the deja vu and I completely forgot what I was doing and why I was there. My mind completely blanked out for a while, and I kept thinking "why does this place seem so familiar" and then I realized the corner we were in matched the place I had seen in my dream.
I might be experiencing some sort of time lapse or maybe I have psychic dreams. Though the thing is, I don't always get whatever it is from a dream. Something will happen and I'll think "didn't they already do that?" or "didn't they already say that?" Then I might already know something or know something will happen before I'm told or it happens. This is really confusing and hard for me to explain. I can provide more examples of these experiences if it can give anyone a clue of what's happening.
Also, if this helps, sometimes I become very tired and one moment I'm at one place, I blink, then I'm somewhere else. I've also started to do things without thinking about them- things I don't want my body to do but then I notice when someone's pointed it out, like it's not even me in control. Does that have anything to do with what I'm experiencing?