Hello there. I to suffer from low back pain. All of my colon seems to hurt, but predominately lower right, I get sharp, stabbing pains. My back really aches lower right constantly, I play hockey so when it gets really bad I go to my osteopath and she relieves it for a while. My BM's alternate between D & C, more C though, I also sometimes feel nauseated and suffer from very noisy bowels. I've seen a GI Specialist, had a Barium Enenema, u/sound scan, blood work etc, all of whcih showed nothing and he agrees with my Doctor that it is a form of IBS. My Mum died of bowel cancer 3 years ago, so I worry like the rest us IBS sufferers.