Heat on the belly may help lessen the pain. Use an electric heating pad set on low. Stay in bed if you have pain and fever. When you feel better, you may begin your normal activities again. Don't strain while moving your bowels.
Good choices are whole grain breads, oatmeal or bran cereals, and plenty of vegetables and fruits.
Drink lots of water. Eat at regular hours. You have a high temperature. You continue to have really bad abdominal pain even with treatment. Your stool is black or contains blood.