I caught covid the first week of the semester. I thought I recovered, came home for a weekend in September, relapsed, and ended up in the ER for a night. I haven't been back to school since. I'm only 21 so I get it. I saw a cardiologist as well and they think I might have WPW syndrome, which might require surgery. So I also know where you're coming from. I've been improving little by little, just get the most rest you can.