Awe, I am sorry you are anxious. I have felt a lot of pain, anxiety, and distress talking about difficult childhood experiences, so, I understand your trepidation.

My suggestion is not to push yourself to reveal everything or reply in a particular way, but to do and say whatever feels comfortable.

I am glad you have tools: do you feel confident that the two of you have a plan for helping you manage your distress during and after the session? That can help a lot.

I felt uncomfortable after sessions, sometimes for days, but I also lacked some key coping skills. However, overall, I have found the experience to be healing and relieving. Hope you'll take extra good care of yourself while doing this hard work.