Why do my bones and joints kill during and after I run?

Okay I'm 13 years old and my mother said I had an ankle ''disease'' called Calcaneal Apophytits. Its where you have a tiny growth plate bone at the back of your ankle and when your born it's not connected to your actual ankle. The plate connects around the age of 16. Well I had that for about a month, then it stopped. I started track Monday March 9 of 2009. We're practicing now and Monday march 16, I went to gym and track and I got this sharp crampish pain in my BONES and JOINTS. The pain hurt so bad I thought I was going to collapse to the ground. It's not a pulled muscle I've had that b4. I get the pain while I'm running and after I run. And as I'm running I feel like i'm going tooooo slow! I'm fast! I can't run because of the pain. Obviously the prob is that my teachers friends and family believe I'll be a huge track star and I CANT run! Anybody know what might be wrong with me? PLEASE PLEASE PLEASE HELP ME! I love running and now I feel disabled! :( I'll use all the help I get Thanks!
 
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