Growing pains or injured rotator cuff or other?

Hello everyone... my life has been frustrating the last 9 months due to a hurt shoulder. Back in April of 2007, (I was 13) I injured my arm whilst pitching. It was a pretty sharp pain. About 2 weeks later, I talked to a doctor, he took x-rays, (from what I saw, there was a space between my arm and shoulder which I believe he said was larger than usual) anyway, he basically just said wait a year, don't do any heavy throwing, try not to throw. So I stopped pitching ever since then. It's now the next season (practice) and my arm still hurts. It hurts less, but sometimes hurts more days than other. In gym cl for warmups, I do situps rather than push ups because it hurts on my upperarm (humerus?) or shoulder. My mom said she recalled the doctor saying it was growing pains... but wouldn't growing pains not take as long to heal? The doctor did ask me if my heels had been starting to hurt and what not. I want to know what the problem is, and if I should be able to throw a baseball next yr.