I am a 14 yr. old girl, with major pains in the right shoulder blade. I ride horses for a sport(dressage). But pulling the saddle of the rack and putting it on the horses back might be the problem. I also have a messenger bag for a backpack so that could contribute to, or my tenor sax case carrying it and pulling it of the self in the band room. It feels like it is going to crack. and when I wake up its not so bad but it worsens thorugh the day. The pain is right on the edge of my shoulder blade and goes through, I have only had this pain since Sunday. I read something saying it might be a piched nerve or a torn rotater cuff or something like that. I have had 3 falls in the past 3 yrs. all of them I landed hard on my back.