I have a lot of medical issues, as well. I always get sick, but because of my motivation to do well in school, I always ignore that and just go. Thought it is a bad thing, but I hate being behind in school. I always have to either be head or caught up(rather be ahead). Now at my school, we are dealing with Swine Flu(I go to community college), and the teachers are practically begging us to stay home if we cough, have a fever and/or feel sick. I know how you feel about hating being behind. I would maybe talk to your teachers and your doctor to see what you can do so that you will not be behind. At my school, we have all of our assignments and other things online, so if we do get behind, we can just look at what we need. We even have this Power Point thing, where the teacher will put the notes and things they cover in class on the website, so that if we miss a lesson, it will be online for us.