I, too, get my memories in bits, and some memories don't make sense. I even have odd triggers from bits of memories that seem to have nothing to do with an abusive situation, but make me panic. These may be certain smells, or certain things that I associate with my father when I was a child. It is tough because I can't remember entire episodes, only parts.
You are confused about the memories because you can't remember all of it, but unfortunately that doesn't mean it didn't happen. Therapy can help to process it all, but it's not easy. I am 6 months into therapy now with my abuse, and I am slowly making sense of it all.
Bluemountains