Linny, I feel so bad for you because my highschool years were the best of my life and I can't even imagine what it would have been like with IBS. I didn't get IBS until my early 20's I had a stressful job at the time so I thought quitting would help, it has helped a little, but I am still plagued by the same symptoms. The one thing I have noticed is less stress not having to work, explaining to collegues why I was running to the toilet, smelling disgusting all the time, lying and making excuses. So my only advice to you is, if home schooling is an option you should try it, give yourself a chance to stop worrying about your condition, relax enjoy it and get great grades.