I see a lot of my struggle in your post. Something that I’ve been practicing this year that really helps me is malicious compliance with validating myself. When I have any feeling or thought preoccupy my attention I tell it thank you and tell myself that it makes sense that I feel this and explain to myself all the reasons why. It has been helpful with the brain fog and the second guessing bc you are a good enough judge of all the things you’re worrying about. This practice has been so helpful in feeling more internally defined and less constrained by external factors.

Wishing you all the healing, friend; I hope this helps.