Thank you everyone. I guess I did not mention that I do have extreme muscle weakness... even in my dreams at night (when I do sleep), which is crazy. I always feel very weak.

That said, it doesn't sound like MG, just because of the huge amount of pain and it being so localized. I'd say maybe 60-70% of the time it is really my upper-right quadrant of my body... shoulder, neck, arm, back-all on the right side.

Thanks again for all the support... will keep searching.