I wonder if they left a stone. I had similar symptoms as stones were missed during surgery in the common bile duct causing irritation to the surrounding organs. An ultrasound, while I was on my side helped diagnose my problem. The catscan was useless. They were able to go down my throat to remove the stone and enlarge a narrowing in the duct to remove the stone. I couldn't eat without terrible pain all the way through to my back followed by nausea.