Oh wow. That's horrible. I would absolutely HATE that! There's no way I would allow a T to talk to me like that. This isn't your fault and you're not messing anything up. This is a horrible T who is invalidating your experience. I don't remember anything about my life before 4th grade, and things from 4th to 6th are really fuzzy. And I'm only 22. This isn't your fault, it is dissociation, like your previous T diagnosed you. You need to find a T who is willing to listen to you and not be rude and invalidating.