Constant doubt

I'm sure a lot of you understand the feeling of constant doubt and worry post narcissistic abuse. Most days I feel ok, I'm lucky there, some days I get angry about it, there are times I will get sad, but most days I doubt myself. I doubt my intelligence, my memory, I doubt my actions, I worry that every little thing I do is out of line or a nuisance in some way. I don't know how to combat that. I feel like I'm cautiously stepping out every single time I do something. I used to be brave, and now I feel timid and scared.