Shoulder round movement. I do exactly?

I am a 23 yr old student of iit kharagpur and i also play cricket. Around 3-4 yrs back while bowling i got pain in my right shoulder while doing up round movement and still it does. I went to a doctor at that time he simply suggested for phisiotherapy and i did the same. I had some session of that & my pain got vanish but whenever i did that moment with a force it came back so i stopped bowling but from last sometime i bowl in between for a while and it pains. I didnt take this too serious till now. I went to a orthopedist in iit. He recommended for an x ray and mri. He didn't talk to me in lenient way. I want you to explain me what should i do exactly? I hope this is curable. I am 23 only and now i am worrying about it. Hoping for a quick and positive reply.