What mistakes have you made that you beat yourself up over at the time, and how do you feel about it now?

Everyone makes mistakes. I’m not so much thinking about mistakes that hurt others, although if that is a story you want to share that’s fine. I’m thinking more about mistakes or decisions where you yourself got harmed in some way. I don’t mean physically harmed, but more along the lines of financial, career, friendships, relationships, and other things that felt like your life was changed significantly.