Hello. I do not have the 'pieces' of flashbacks as you describe. But, I never forgot of any of the sexual abuse, I just put it to back of my mind, and tried tell myself that is was not of importance. The memories, they always were there. The only thing I ever actual forget of was the death of my brother, which happens almost 20 years ago. But I still get the flashbacks. Sometimes, I feel them come on, I start feel some edgy, or shakey, and start feel of panic, and I know it is probable to come up at me. Sometimes, though, it is what i call the 'whoosh'. Something just happens in my body, like it is slammed up at my head by someone. I hear of other people say that actual 'flashbacks', they are indicating of things we need to remember of. But that does not make sense at me, as I always remember of all it, and I still get them, and body memories as well.
I think it is good idea, to keep journal of what you get, the memories and flashbacks of them, to share with your therapist. Mine ask me to keep one of this week, because I have been losing of time some, to see if we can find pattern of it. I hope that you discover more of yourself, to be able to better heal of it. I wish you well.
Leosha