Hi. My Name Is Elli And I'm 12 Years Old.

Hi. My name is Elli and I'm 12 years old. I have been having terrible pain in the lower part of my tailbone for at least 1 month. I horseback ride, but I havent fallen and my tailbone doesn't hurt at all when I ride. School chairs hurt, and so do getting up and down from either a chair or bed. I haven't tried any ice, Advil, or heat, but the seating chair cushions aren't hurting. Hopefully you can help me. :-)