I got diagnosed with IBS a year ago. I had colonoscopy, CT, Blood and stool testing done. Everything looked good. My initial complaint was constipation, and lower left abdominal, and rectal pain on left side. It has continued and I have the pains even when I m not constipated or after I have had a productive bowel movement. The pain radiates down my leg, knee and lower back. Left side. It comes and goes but seems to be getting progressively worse. Constipation still comes and goes. Pain seems to be much more than just usual IBS or constipation symptoms. It s a very strange unusual pains.