Everything I’ve read online shows that a lack of sleep causes increased anxiety and fear. But in my experience after a certain point I just hit a level of “Idgaf anymore about what happens” and my anxiety almost disappears. I first noticed it in college when I’d pull all-nighters 2-3 times a week. Even now that I have a much healthier sleep schedule, if I pull an all-nighter my anxiety is almost nonexistent the next day because I’m basically too tired to care anymore. 

Has anyone else ever experienced this?  I can’t find anything online about it. 

Background: my anxiety is mostly social anxiety and is usually difficult but manageable. It definitely peaks when I’m depressed though.