When you get stuck and can't talk, is it in response to a question that your T asks you or do you start the session not talking? I used to freeze up in therapy because I was afraid of my T or what she would think of me. I didn't feel safe with that T. Do you feel safe with your T? Do you know why you can't talk? Can you draw how you feel when that happens? Maybe in the session? I fingerpainted once in my session and that relaxed me. What about meditation/breathing? Will your T do that with you?

I used to have selective mutism as a child and I remember when I couldn't talk to people. I sort of disassociated, I think, to avoid talking. I don't know exactly why I couldn't talk, though.

It does sound like you've tried a lot of things. Can you accept that you have to communicate a different way when you can't talk? Just write notes back and forth to your T and don't get anxious about not talking? Is it when you're talking about hard things or just anything?

Silence in therapy isn't necessarily bad, though. Maybe you just need to sit there for awhile and try not to judge the silence.

I'm sure you'll get other responses because it's a more common problem than you think. You're not alone!!!