About three weeks ago I started to have some severe shoulder pain in my left shoulder (not heart related). The pain is up the side and the back. I went to the er and they said a strain and put me in a sling for one week. I went to my own doctor a week after the er. She said same thing or calcium build up... Got x rays they came back normal. At this point the pain on a scale of 1 (being good) - 10( being worst) it was about 5. Same thing keep the sling on only this time when out and about but when at hoe use the arm. Which I did. Went back this Monday still had minor pain when lowering arm. My dr. Gave me at home exercises to do and cleared me for work. I work at a farm and on a couple volunteer fire dept. So today I used my arm and shoulder as normal but didn't over do it...the pain is back...same spots and about an 8 on a pain scale. Any ideas? Thanks!