You are doing some realyl great work there, Dream.

I wonder if the shame is so loud right now because your relationship with T is challenging so many long-held beliefs and feelings about yourself.

Sometimes the only way to change something is to truly pick it up and examine it/explore it/attack it from all different angles, and then reframe it. If you can imagine all that shame as a black rock, for example, your Ts acceptance doesn't mean that you can simply throw that rock away or that it doesn't exist anymore. It is a part of you - your whole being is shaped on the foundation of that rock.
But maybe what your T's acceptance is doing is causing you to really examine the structure of that rock and question its validity. And, I don't know about your black rocks, but whenever I question mine they protest and defend themselves REALLY loudly.
The good thing is, this exchange between the rock and you creates change. Before it was a black rock that simply 'was', unchallenged, but now it is a black rock under scrutiny, challenged by new information, new perspectives, new ideas. Now it is a black rock undergoing a process of metamorphosis.
This uncomfortable place you find yourself in now IS the healing process at work.
I wonder what the black rock will become when your therapy process is done.

Thank you so much for sharing your experiences. Your description of your session was beautiful to read: there's some very powerful therapy going on there.