I don't have an answer for you except to say that you need to find another bariatric surgeon. Obviously there is something wrong, an dobviously it is not being addressed.
There are many things that can cause pain, you may have a ulcer in your blind stomach (the only way to Dx that is by a catscan with contrast), you could have some type of stricture, possibly some type of internal adhesion, scar tissue, and the list can go on and on.
If the pain is increasing, and not getting better, then the next step after the cat scan would likely be some type of exploratory surgery. Sometimes they just can't see it all on film and have to go in and look.
Again, I'm sorry you are having this issue, but the reality is that your surgeon has let it go too far and you need to find someone else to help fix you up. If you lived in NY, I'd send you to my surgeon, he's one of the best revision surgeons on the east cost. I'm not sure who would be a top revision surgeon in La, but if you have to travel out of state, do it, find someone who will fix you. Things can go from bad to worse very very very quickly.