Totally relate. I really believed that I would never fully believe that the first rape happened because I couldn't remember the precise bit of the rape starting. I remember the lead up, the conversation, the immediate aftermath. But not the immediate start. And without that bit of the puzzle, how would I *know* I had been raped?
Anyway, I've never remembered. And I believe the rape now.
Because of a lot of work learning to accept the rest of the memories tell enough of the story. Learning to trust the fragments. Learning to trust my body and my feelings. Learning what my body is feeling to then be able to trust my assessment of that. Learning about the impact of trauma. And learning to accept a 'knowing'. For example, in another 'event' the fragments are such that they only way I can describe the memories is that my mind shattered into a million pieces that are floating around and all I have is a sense of knowing what happened rather than a memory that can be put together in any form.
You can heal from this with the level of memory you have now.