I had similar pain, and blamed it on my computer. Then I married a chiropractor, and the pain went away. I don't know if it was the chiropractic treatment or......other things.
Before I got married, I found I could get relief for my sore shoulders by vigorously mopping a gymnasium, swinging that old mop from side to side in a broad swath.
And that's the truth.
-Joe Offer-