You need to get the flare up under control so you can relieve the urgency that is causing accidents. I am so sorry, i can't imagine how difficult it must be, especially since kids can be so mean. Have you told your parents what is going on? Do you see a GI doctor? What medication have you tried?
Once I had an accident of sorts at work. I had to throw out my underwear. It was the worst. It happens to all of us.