Depending on the therapist, I think some do see it and attempt to help you fight against it without being obvious.

Over thinking is a constant problem for me. I do it 100% of the time with no breaks in between. I've tried to stop it before and found that it only made the problem worse because then I was over thinking about over thinking. It's an endless cycle.

I think mindfulness is the best counter to over thinking. I do it sometimes. You just sort of let thoughts pass and focus solely on your breath and present. It's almost like meditation. It's difficult for me because the moment I'm "calm", I get sling shotted back to a full panic and possibly flashbacks.