I can totally feel for you. I had to drop out of many classes before and, once, a whole semester all due to Crohn's flares.
But something VERY IMPORTANT you should know--I am writing because I wish someone had told me this--there are specific grants for people who are disabled and going to college. Now, NOBODY told me until my Junior year in college that Crohn's is considered a debilitating disease (of course, We all know it is), and that I qualified for help from our state's Office of Vocational Rehabilitation (they help people with disabilities get through and pay for school to find jobs). I could have been getting grants from them for the first 2 1/2 years of college, had I know it was available. The guy who I worked with told me that many people do not realize they qualify, and much money goes unclaimed.
I do not know what state you are in (I am in PA), but I am positive that you have to have some sort of similar organization for you in your state.
They helped pay for my junior year, and paid almost all of my senior year tuition. I also was able to go to grad school and get my Master's (though they did not help with this).
Call around, look into it--it could definitely be worth it. I also was paying $500/mo for good health insurance at the time I was going to school...it totally sucks.
Hope this helps!