IBS for 8 years

Have had IBS for about 8 yrs but the last 1-2 yrs. it has gotten worse. I also have Fibromyalgia,Osteoporosis,Scoliosis and a Laminectomey at right hip so it is hard to determine just what is causing a lot of the pain. I have IBS-C and pass only small amounts at a time, then will have a large movement, maybe once a week. Recently have a lot of aching in lower back/hips, upper legs, and sometimes abdomen. I had a cat-scan of my abdomen and only thing it showed is a shrunken pancreas ( prob. connected with my Diabetes ).

I have tried some meds but they did not seen to do much. Didn't bother to go back to the Dr. as I don't like to take a lot of medications. Most of my pain comes on when I lie down, if I am up moving around, it is much less. Also feel as if there is pressure around the rectal area.

Wondering if anyone else has pain in this manner?