Have you considered getting a CT scan? I was banded june 2010 and in August 2011 I had horrible pain in middle abdomen felt like gas bubble/ side ache. The pain would move from left side, to middle and to the right. My Dr recommended a CT Scan and blood work. The culprit was my tubing, my intestines had flipped over and adhered to the tubing. I had surger to have it repositioned, not a big deal. However 8 weeks later, the pain returned and again I had a CT scan and surgery to shorten the tubing considerably. I just had my post op check up today and I am sore but feeling much better!