You poor thing...not again! I am so sorry...
Call the doctor again, this isn't normal. I know you had a lot of tests but my WLS Doc told me they can't actually see a stricture on a CT Scan. Did you have an upper GI?
The Gastroenterologist told me that they have to go in and look to see what's up. He ordered an upper GI but he pretty much said that even if it didn't show anything, I was going in to have the scope done.
I did, it showed a little narrowing, I had the scope (spent days worried and terrified, it was nothing! Lots of good drugs)(Didn't even have to take my clothes or shoes off!) He found a narrowing, expanded it (Didn't feel a thing) and that night I felt better.
Call the Doc - that will always be my advice...you need some medical help!
Wish I could do more - but I am sending good thoughts your way...and a hug!