I understand that one!
When I was in t, I created an online journal at livejournal.com
I invited t to read when there was something he should know and he did...even commented at times.
It was the most healing thing I could've done for myself, and MASSIVELY helped move therapy along...his understanding me so much better, because, like you, I couldn't verbalize some things. Further, I couldn't stand for him to read it in my presence and by the time the next week would've rolled around I wasn't even close to being in the same place.
So, he'd check the journal before my appointments. You can make each entry private for just you and friends specified. Your t could be a friend, or you could give her the actual password.
It's just an option for you and t.
KD