Let me see if I can say what I'm thinking and make it make sense!!
Your post on the psychotherapy board sounds like you're making big changes....moving to a new level of trust with your T, maybe something you've never felt before. When I have big internal shifts like that, it's often accompanied by a lot of anxiety, and even panic attacks. My T says it's because the old thoughts and patterns are being pushed out, but still trying to hang on. It's a big internal struggle.
I wonder if something like this is going on with you??