It sounds like a flashback to me, but I'm not an expert in your experience. For me, flashbacks tend to be much more sensory that memories--basically, memories are like watching a movie from a distance, and flashbacks are more like reliving it.

No one here can tell you exactly what happened--I know I wish people could tell me for sure what I remember is real, but it has to come from inside of you. It sucks because it would be easier if someone could tell me exactly what happened to me, but I've had to come to terms with the fact that I may never remember everything, and I'll never know how factual some of my memories are. But I've mostly been able to accept that, and it has gotten easier over time.