I had an incident years ago where I passed out at my job due to one of the duties they gave us, and woke up and couldn't remember anything.
(my sister will be telling me a story, and I will be laughing my ass off, and she will say "you don't remember do you"...nope lol)
But a good portion of things did come back. But I do have flickers of incidents, things I am trying to fully grasp, but cannot. So I think I know what you are talking about. I think even if I hadn't lost and then regained memory, that trauma would make me forget certain things, only to get a flash of the memory here and there.