Posted 3/28/2016 1:29 AM (GMT 0)
Welcome to the forum.
The surgery probably has nothing to do with the diverticulitis, IMO as a patient, not a doctor.
As a patient with years of diverticulitis problems and surgeries, I sympathesize. It's not fun.
All I can suggest is avoiding gassy foods and drinks, trying not to swallow air, as in using straws. Maybe there are some more tips in the archives. See the search box at the top of the page.
Best wishes.