Thanks everyone for your replies. I ended up calling T today to apologize for what happened yesterday (for telling her she was was aggravating me, and that she was being difficult and for what happened right before I left- I didn't tell her i was on the verge of a panic attack). I told her I felt like I was being mean to her when all she was trying to do was help me.

She accepted my apology, but told me I had nothing to apologize for. That those were my feelings in that moment and it was OK. You all were right! I'm sure we are going to talk about it more at our next session.

Thanks for all of your kind words!