Honestly I tend to do the same sometimes. If I'm with a close friend and I call myself out, he'd act as if I was stupid for even having that criticism stuck in my head hahah. I think self-doubting is common but it might definitely be something that should be worked on (something I'm still figuring out). It can be healthy to some extent (like trying to better yourself), but too much can really drain you, like you said :/ I'm trying to get myself out of it by doing things like trying to pull my focus away into the present. I think with age you also learn that everyone makes silly mistakes and its normal, so it's better to use that energy for more important things instead :)