Okay, I might get some wrath here...but have you tried anything to control your symptoms so that you can stay in school? I ask because in my opinion (and I must emphasize this is only one person's opinion!), during these years of your life, it is best to stay in a normalized school setting, among your peers. It's a crucial time in your development and I fear that if you stayed at home because of nervousness or anxiety about your bowel problems, it could heighten them down the road for you during adulthood.
I know how terrible bowel problems can be, and how hopeless people feel when they are enduring them. I know it's embarassing, especially for a young person, to be going to the bathroom all the time. But I wonder why no one has suggested treating the symptoms with something that will make it bearable for you to be in a regular school setting.
I'm not saying homeschooling is bad by any means! I think it can be really beneficial for some kids. But if you have been raised going to public school, and suddenly you are home-bound, that can be a pretty big whammy for a youngster. I'm going to read your other posts to see if I'm missed something, though.