It sounds like the T got out of her depth somewhere and didn't deal with this effectively or skillfully.

Unless I was in danger to myself, my T has always left it up to me if I come or if I go. I've stormed out before and the door is always open for me to come back.

It seems like there should have been more of a conversation. I don't know how your T was the rest of the time and I'd hate to judge a T by a single situation (my T has certainly screwed up), so if you can look at the whole and make a wise minded assessment, is it possible that she didn't mean to shut the door and the communication just broke down? That's assuming you want to continue working with her.

If you do, maybe contacting her and saying that you weren't clear and it seems like there was there was a breakdown could help clarify if the door is truly shut or if this was a breakdown in the relationship.

Just some alternate thoughts.