[mattsonn]

I have much a less extreme version of what you described. It changes from day to day. And I don't act anything out. Instead, when I'm in full blown daydreaming mode, real life and what ever it is that my brain has decided to latch onto will fight each other for my focused attention. Now that I think about it, I realize that I've had this since I was a little kid.

I get it more when I'm stressed also, it's like my mind goes into that mode as a safety switch. For me, a cold shower will snap me back to here-and-now. But you might want to see a doctor, obviously one who will acknowledge the problem instead of just waving it off as silly.

Edit: I just saw this part in your post

"I just keep reliving the past, and then I start creating these scenarios in my head about.."

I COMPLETELY have that too...to the point where it's ridiculous. When I was in elementary school, I saw a 3-2-1 Contact show about drugs. They said that crack can block a certain part of the brain that prevents experiences and thoughts from being played out over and over again in your mind. The example that they used is that a person who's on crack and then goes on a roller coaster could end up reliving the ride over and over again afterwards. The episode freaked me out of course, but even then I could relate to what it is was talking about.