It’s nuts, literally. I had the same thing a few years back, thought I was dying on the way up north for a family vacation. Went to e.r, diverticulitis. The main thing they told me i
was to avoid nuts, seeds, etc. My 22 yr old nephew recently came down with the same situation, and was given the same advice. Sucks, but, We have been able to keep it in check. I’m surprised your doc didn’t say anything about nuts. That seems to be the instigator. Check that out.