Stomach pain from cabbage....oops
I went thru the same thing at six months out but with collard greens. Felt like I was trying to digest glass. For me it was simply a matter of taking some papaya enzymes and time. It did pass but it took a few hours till I felt a bit better. I avoided all veggies except those that were cooked to death...lol, for awhile after that episode.
For the first year I kept papaya enzymes on hand. When I tried anything new I made sure I was at home so I could lay down, chew my papaya and try to relax if the food got stuck or in the case of the collard greens, hurt.
I hope you feel better soon. If you don't then I would definitely call the surgeon and see what they suggest.