OP, if diverticulitis runs in your family what are you doing about it? You do know it's caused by your body's reaction and allergies to certain foods?
Do you drink alcohol, eat sweets, red meat, fatty foods, processed foods, fast foods, bread, sugar, & dairy? If you answer yes to any of these, you need to stop.
Change your diet, take a daily fiber supplement, daily probiotic capsules, drink 70-80 ounces of water, daily vitamins and daily exercise. No alcohol or soda.
Running a fever means you need to see a doctor. ASAP! You may have an infection, even a perforation in the intestinal wall, and/or bleeding and mucus pouches. You may have to have a section of your large intestine surgically removed at some future point if you don't take care.
Start a special diet until you get things under control. You have to avoid mucus producing foods. No fresh fruit except for bananas and cantaloupe. Canned peaches are fine, but no pineapple, grapes or berries of any kind. No dairy except for Greek yogurt.
Get rid of the bread, or at least limit yourself to one slice of high fiber bread a day. Get rid of all processed foods and red meat. Nothing fried or greasy.
Use Olive Oil and brown rice, eat only cooked veggies, except corn. As for salads, stay away from raw onions and ice berg lettuce. Eat romaine and bibb and mixed greens.
But most important, get to a damned doctor to make sure you don't have a medical condition that will require hospitalization and surgery. I'm not joking.