Got a medical question? Let me stretch my brain.

[Cenookie]

First of all thanks, a couple months ago I was helping a friend move furniture when I felt what I can only describe as a warming sensation and pain in my shoulder. I immediately lost strength in my shoulder. In fact I wasn't able to put my truck in gear to drive home. My shoulder only hurts when I move it a certain way. And at night in bed it's not a pain like in the muscle, but more of an ache. I can massage it and fell no sore spots, but move it a certain way and PAIN.