Got hit from behind in a game the other day, Felt a slight pop in my back by the shoulder blade and had the wind knocked out of me. Haven't been able to take a deep breath, cough, or laugh without having a sharp pain in the one spot on my back. There's no bruises. Hurts to lift my arms over my head, hold heavy objects, and turn at the waist. I was told I probably pulled a mucle or a might have fractured a rib, but not sure what to do