I had a similar problem. Pain on right side but no one knew why. Finally, after looking at my MRI, my old doctor said. you have a cyst on your kidney. Wait until it bursts, In the meantime, He suggested pain pills he prescribed. I think it burst, because after six months I feel so much better. I was told I had diverticulitis which I may have had, but still it took my old doctor to make some sense.