I'm sorry that this happened to you. And I'm sorry that your T wasn't more comforting in his response. I suspect that because of the nature of the issue he doesn't want anything to be misconstrued over email and that he'll be more comforting in person at your session.

I would talk to your instructors though. It does no good to keep retraumatizing yourself in class. I know you feel obligated to be a practice person but you experienced real trauma that you're working through that gets triggered in class. Human decency would allow for certain exceptions. I know it's hard to share things like that and if you don't feel safe or comfortable, that's OK too.