I am a 33 yr old male that was rope swinging into a pond 3 days days ago. I backflopped into the pond from 12-15 feet knocking the breath out of me. I have had sharp pains in my back and left shoulder starting at my back shoulder blade and ribs wrapping all the way around the front to my sternum. If I lift my left arm higher than my shoulder or breath deeply I have sharp pains in my lung and shoulder blade area, I tried to lift a gallon of milk and couldn t with my left hand earlier and when I picked up a laundry basket earlier, I was in an extreme amount of pain. At first I thought I had fractured or bruised ribs but a good friend says that he thinks it is my rotator cuff. my question is - should I get an xray? I showed no bruising, only serious pain when lifting with my left hand or breathing deeply.