I have lost weight about 40 lbs in past 6 months from 200 to 160 now going back up to 168 i have had severe pain in abdomen or stomach for past few yr?

Maybe losing weight : Too fast, and stimulating your gallbladder to go into spasm as you reduce your fat intake. There's a common issue with those who have been on Jenny Craig diet, that the general surgeons have made a lot of money removing inflamed gallbladders in these patients, who had rapid weight loss. Slow and consistent weight-loss is the way to go, to keep the weight permanently off. That should also reduce the gallbladder spasm you're having.