I slept on my arm about a year ago and the pain was so severe that I could barely raise the arm, pain radiating from back, neck, down arm. Eventually, it went away, and is back with a vengeance. I can t reach for anything and when typing, feel it in my bicep and shoulder blade. I am taking ibuprofen and sleeping with pillow under my arm, but have to get the right position or it hurts terribly. Help, please.
This does sound like it is most likely due to the position that you slept in.  I agree with sleeping on your side on the good arm and with a pillow under the bad arm.  You can try easy range of motion exercises like bending over and making small circles with the affected arm hanging towards the floor. I agree with ibuprofen which you can take every six hours for the next few days to help the swelling reduce.  If you don't see any improvement, I recommend going in for an evaluation.