Osgood schlatters in left knee...

I'm a 13 year old girl and i have had osgood schlatters in my left knee for about 3 years. it was never this painful until i started playing on an all star softball team this year and that made it even worse then it was before. and im also very active. soft over now and now i have cheerleading 4 nights a week and its not helping it i know. but ever since softball i have been having really bad pain in it and sometimes when im running or walking it like bends backward and hurts really bad. and its all swollen it looks like there is another growth on the side but its just swelling. my whole knee is like oversized it looks pretty funny when its next to the other one=] so i went to the dr. and he said that if i can play through the pain then i can play sports and stuff but if the pain gets 2 unbarable we will consider surgery but i really dont want it. so is there anything i can do to make the swelling and pain go away? i have tried advil and tylonal and icing it but nothing works...heating pad..icy hot...tiger bomb..nothing! please answer soon thanks =]