Granite, I have been in this state and it was my own personal hell. I'm sorry that you are going through it.

I have pulled out of these depressive anxiety spirals, with the help of therapy and exercise and constant mood management. But, I don't know what exactly fixed it or if I am 100% fixed. I do know that it doesn't have to always feel like that and that when you're in the middle of it, it's quite frightening and awful to experience.

I agree with MCAK, it sounds like an emotional flashback.

The only thing I'd add is, T's should not get tired of you like a friend or family member would. That's why they become therapists -- to deal with this stuff.

I hope you take care of you and find comfort.