Deja vuPsychology- the illusion of having previously experienced something actually being encountered for the first time.
-An impression of having seen or experienced something before
This is most likely what you're describing, and yes, I have had this happen to me before too. Deja vu is in essense just an event or something you experience that you know (or felt) that you already lived through. It can be a very eerie feeling, because when you're in the same place, at the same time, with the same people, talking about the same exact thing you've talked about before or something, it can feel incredibly strange and foreboding even. One of the far-out theories that I always liked to contribute to it, is that we actually
have experienced it before, but in that time, something else happened, that wasn't meant to happen. So we get to live that part again, to make it right, or change it, or something.

Although everytime I've experienced deja vu it was always during insignificant things, like, "Woah! I know I've eaten at this restaurant before, with you, even though I didn't know you back then." Or, "Wait a second. I knew you were going to say that. This has definitely happened before. Don't you remember? :\" It's not anything that you can say is a really life-altering event. But who knows? ;P Maybe before when it did happen, the person I was with ended up having an argument with me, and I never saw them again. Mostly unlikely ;P, but still fun to ponder about.