I need someone's help! I'm currently 13 and have (what I believe to be) a very bad case of OCD.?

I've known that I've had OCD ever since I was a child, though I never told anyone, because normally I could just deal with the feeling quickly and forget about it,but now it's harder. The feelings come on stronger than they did before. It's gotten so bad that I can't even play video games without reloading files over and over again, I erase TOO much when I write with pencils in school, and I can't even tell the difference between my hands actually being dirty and my compulsions to wash my hands anymore. Please can anyone give me some advice as to how to get rid of my compulsions? I need help because I really can't go on living this way.