Jol, yours and mine sound a lot alike. And don't worry, I don't know what I'm doing around here yet, either. ;-) I wrote something about mine months ago. I've always thought that my flashbacks are very much like I would imagine travelling back in time to be. It sounds incredibly hokey and weird, and like maybe I watch to much Star Trek... but here's a "cut and paste" of what I wrote, dated 4/26/10:
A flashback is not the same as a memory. A memory is when you think about somewhere you’ve been or something that has happened to you. “‘Oh, I remember when we went to Italy. They had the best food.” This is a memory. A flashback is when your mind firmly believes you are actually in Italy. You hear it, you feel it, you smell it, you touch it, you taste it. Your body may be in present day 2010, but only by technicality. As if the engineering world has just not caught up with sending the body to where the brain is located.
I can sometimes tell when one is coming on because I get very warm (unless maybe that's an early hot flash? lol!) and a little nauseated. I can hear sounds that are in the present, but they sound metalic and sort of distant and muffled, like they're on the other end of a long hallway. Otherwise, I really have no connection to the present. I am in 1988 lock, stock, and barrel. Mostly it's for a matter of seconds to a minute or two, but I've had some really bad ones that have lasted much longer. My husband tells me I just stare off into space, and breathe a bit faster. The most disturbing part is, I scratch the living hell out of my left wrist, trying to get a sensation of a rope to go away. Sometimes it's bad enough to draw blood, which serves as a bitter reminder later. I usually shake like a leaf for awhile afterwards. If I'm somewhere public, I need to be alone. If I'm around my kids, I go into another room afterwards so they won't notice. The worse they are, the worse the "aftershock" of feeling depressed is, both because of the flashback itself, and the "dammit AGAIN? When am I going to just be done with this?" thing. If I can't be alone for awhile afterwards to process and "come down" from full fear mode, I get irritable, and can feel like biting someone's head off.
I'm still trying to find a way to prevent them - or at least delay them - or snap out of it. I've heard people have some success with peppermint oil (smelling it to keep them grounded) or holding onto a piece of ice, but I don't get enough warning to implement that. They come on quick.