I have weakness in my left arm. Not numb, just weak. At the same time I was having a lot of pain / discomfort in the lower part of my neck (more like between the top of my shoulder blades). I did no connect the two symptoms. After about 2 weeks, my left shoulder has started hurting and throbbing some, but the main problem is that my shoulder, shoulder blade and collarbone are all snapping, popping and grinding LOUDLY. It is not anything I MAKE it do; any movement of my left arm makes that noise. I saw my pcp, who did an x-ray and he said it looks like the scapula is disconnected somehow, so he sent me for an mri. The tech said he couldn t really tell me anything except he saw a lot of fluid. I have no idea how this happened: no injuries, falls, accidents....nothing. Now I have to wait until next week to see my doctor and get the results, so I am going crazy. Any thoughts?