A few days ago, I started feeling an odd pain in my upper-left arm. If you imagine where you normally get a flu shot - around that area. Deep inside the arm. Now, when I'm awake and walking around there really is rarely any discomfort and I have full mobility of that arm, but when I lay down to go to sleep and attempt to roll over onto my left side, it is far too uncomfortable to do so - it even hurts a bit on that left side when I roll over on my RIGHT side (I guess due to pressure, angle, etc).
This discomfort seems to *sometimes* spread to my rear-left shoulder blade area, and my left neck/back area, too. It's worst of course when I try to lay on that side, but also for a while after I wake up in the mornings. Once I get up and around a bit, it goes away either completely or close to completely.
Tylenol offers little help. Ibuprofine helps more, though not completely.
So between me and my coworkers, we're pretty much ruled out an unexplained broken collar bone, or a dislocation since I have full moveability when standing. What else could this be? Could I have somehow torn or ripped a muscle in my upper-left arm? A pinched nerve? I'm not used to this kind of pain, so I have no idea. With no insurance, I just can't hop into ERs for Xrays at a whim, so any insight by others would be appreciated.