Are there leave of absences during a college semester?

I'm currently a college freshman. My semester ends in May and I am having health problems as a dorm student. I have a low heartbeat, low blood sugar, dizziness, lightheaded, trouble sleeping, anxiety/panic attacks, episodes after I eat where I have trouble speaking, body aches every day and chronic fatigue. I suffered from Anorexia and Mono in HS. I might have Chronic Fatigue Syndrome but it's difficult to diagnose. I know colleges are different, but are there policies where you can study from home and then come in during weeks for exams, like midterms and finals? There is no info on the website but I will look into it. I was just wondering if anyone has heard of this.