Illogical thinking in the form of ruminating, worry, regret, fear of the future ... all of these ARE the basis of anxiety. If you are able to control the progression of anxiety to panic you have made a lot of progress with CBT. Plus, you recognize the problem for what it is and that your thinking is faulty. I can remember a time when I was so invested in the physical symptoms, I didn't even KNOW there was a thinking problem.

You may be frustrated right now but you are on the path to recovery. Keep talking about it ... that always helps me. You know too much now to go all the way back to where you were. This, too, shall pass.

Hugs.