I forgot to mention Kendall, that another common trigger,for me anyway, is dried fruit, raisins, currants,apricots and especially dates...so watch out for those in muffins etc.
I tend to agree with you about the doctors not knowing too much about this disease. Diverticulitis is a common complaint with older people, and people tend to suffer from it in varying degrees. The longer you suffer without healing the initial attack, the more of your colon can become affected. I went many years trying to treat this on my own ( affeared of the dreaded cancer diagnosis!) I now have three feet of my colon which may have to be removed if I don't take very good care of self. I received the greatest amount of help and guidance from the nutritionist. I have only had one attack in the past year and a recent colonoscopy has shown that my colon is looking pretty good considering. Knock on wood! Take care!

LL