Hi Catalyst,
Sounds like you did some very important work with your T.
I found when I started expressing anger and rage at my T (when he had and hadn't done anything wrong in my opinion), I was terrified that it would either destroy him, make him hate me or destroy the relationship. So many of us grow up with anger being an incredibly dangerous and destructive emotion because parents don't always handle it well.
It sounds like your T managed the situation really well and that your relationship with her is safe. I do understand the worry and anxiety though.