Yesterday, I had a project to work on and a deadline. I went all out, barely ate, hyper-focused for 11-ish hours and got the project submitted. I felt amazing, so focused and driven, and I was really happy with what I created. Today, I have no will to live. I've barely moved from the couch, and I feel super anxious. It's sunny outside, and I know I should go for a walk, and I just don't want to. I hate that super productive days are usually followed by major crashes. Anyone else like this?