could you possibly just be dissociating when you walk in there? i had a period of doing that, it comes and goes. i know exactly what you're describing. im not sure how to get out of it either but i have. it seems like at those times i was being triggered by being there in therapy and being there with my therapist. i also felt anger at him and would challenge everything he said, shut down upon the start and leave that way... often wondering why i even go there at all. i did start talking to him about that experience... it took a long time. i just fessed up to what was going on with me