Hard to get up

Now, my left shoulder is sore.  I am not sure it is from overuse trying to get out of a chair or bed or I have torn a left shoulder rotator cuff.  Really frustrating, with my right shoulder in a sling day and night.  I slept on the couch last night and it took me forever to get up this morning.  It was raining all day and I never left the house until nearly 9 p.m. tonight.  Went to Iron Works and ran the 360-foot track (14.66 laps = 1-mile) inside the building.  I kept losing track of my laps, but it was around 20 laps.