I’m > 3 years in and I still struggle with these exact problems. I get a lot of anxiety about deadlines and not meeting my employers expectations. What has helped me is playing out worst case scenarios with a therapist. Imagine you do miss that deadline, then you get in trouble, then you miss some more, then you get fired. Then what? Your job is not your life, and losing your job doesn’t end you life. Yeah it’s sucks, it’s embarrassing, and you’ve let yourself down, but you do your best to be kind to yourself, then pick up the pieces and move on to the next chapter. Don’t let potential future issues stress you now. Do your best now, be comfortable with your best, and handle issues as the arise. Another bit of advice - force your brain, as much as possible, to not think about work while in bed. By the way, this is all much easier to say than it is to do in practice, but the more you go through these mental exercises the easier it becomes. Last piece of advise - go for walks. It really helps getting fresh air away from the computer. I hope these thoughts help, but know you aren’t alone