Hi cr lady, What kind of pain are you having this time? You said it isn't as severe as the other times. Is it a cramping pain? Do you have a fever or do you wake up in a cold sweat during the night?
I have multiple diverticula and have had one hospitalization for diverticulitis, but no operation. It was cured with IV antibiotics. I knew I was having the next attack and could cure it by taking antibiotics by mouth at home. And, many times it can be cured by eating extra fiber, and at least in my case never eating popcorn or nuts or cucumber seeds.
Of course, everyone is different; but usually the diverticulitis starts as constipation. That's why it's very important to be sure you eat lots of fiber-rich foods and/or take a fiber supplement, such as psyllium.
I agree with the poster who said that he doesn't think the specks on the toilet tissue were "coffee grounds". From what I understand, the stool looking like coffee grounds would show in the toilet and look blackish.
Certainly it would be wise to discuss this with your doctor. When I had my first attack, I called my doctor very often. You have to know exactly how your body reacts to minor or major attacks of diverticulitis so that you will know how to manage them. Good luck!