No, no. This is the exception to the usual. When you read "3000 calories a day" over and over, it sort of gets you into a trance. But, relax. You don't have to eat every day. Especially if your stomach is upset. Even two to three days of straight-up water-only fasting will have very little impact on your health. If the tummy is tired, give it a rest. That is usually the best approach.
Depending on what is actually wrong with your stomach, different foods may or may not be recommendable.
Steak, eggs, potatoes - fruits, nuts, berries and forage. Coconut milk and potent herbs and spices. Tea instead of coffee now and teeny amounts of kelp daily. Let's see how this does! Not really had dairy much, and gut seems better for it.