Bubba, this sounds like the problem I was having. I kept having severe abdominal pain, couldn't eat much, because it only made it worse. After a while I would start to vomit. Away to the hospital we would go. They'd make me drink the contrast, I would throw it up, they'd do CT anyway. They would find nothing. This went on for months. Finally one ER visit, the CT came back that my small intestine was so, to put it mildly, so swollen and full of shit that they wanted to do emergency surgery. After talking to my surgeon, I was admitted, out came the GI tube, and enemas. My surgeon after much back and forth with my GI decided they would take this route first. After a week, they finally did a scope and found a stricture at the pouch outlet. They said it was only open about the size of a pin head. The GI tried balloon dilation. That didn't work very well, but did open the stricture enough for liquid to pass. Long story short. After weeks of miralax a couple of times a day and enemas the surgeon finally did dilation with hegar dilators. That also only went so far, but a lot better than the balloon. I hope this isn't your problem, but that stricture did not show up on the CT scan or abdominal x-ray. Something to look into anyway.
Aimee