You're definitely not going nuts, Sweepy. I think it sounds like a seal on your anger has been broken, and she's there (and can take it, by the sounds of things - if I remember rightly you are finding this T good to work with even though the work is pushing you??) so it will be directed at her.

I think it is good that you feel angry. That anger is you getting even more on your own side - thinking who the **** taught me this is all I'm worth? (about the csa)

I also think it says a lot of positives for your T relationship. It sounds like you trust that you can express all this very difficult stuff (both the disclosing of the memories themselves, and then the storm of emotion that is brewing) and feel safe to do so, that you don't have to be on your 'best behaviour' with her.