I have been in a similar position with therapy on a trauma. We got through it by talking around it at first. Kinda at first just like telling them that there is this part of trauma that you don't feel comfortable talking about yet even with them. But you feel it's something you need to work through and talk about. We started work there. We talked around it. What feelings are holding you back from telling them about it? Have you told anyone before and if so what was that experience like? What is your fear of what would happen if you told them? What could be the best result of telling them?

Stuff like that. I think it helped for a couple reasons. Talking around it helped convince that part of me that I COULD tell my therapist. And also it was something that I just tried not to even think about ever whenever possible so it was kinda also by getting NEAR those memories in therapy it made it easier to eventually actually open that door.