I felt the same way after disclosing some stuff to former T... Your T sounds like a really good guy, and I don't think he will be judgemental... I know it's scary though. Just keep breathing. Can you get in earlier to see him? or maybe have some phone contact for reassurance?
When I first told former T, it kinda came out unplanned, and it really threw me for a loop. I panicked and called her. She was able to get me in right at the start of the week (out appointments were at the end of the week). I was terrified that she would judge me or think less of me. She was actually really awsome. She reminded me that the stuff was not my fault, and all the shame/embarassment belonged with the abuser...