There are several possible causes for stomach pain, including indigestion, food poisoning, food allergies or intolerance, urinary tract infection, irritable bowel syndrome, constipation, gas, and ulcers. Some of these may be related to diet or lifestyle, while others may require medical attention. If the pain is chronic or severe, it’s best to consult a doctor to determine the underlying cause.

you can try these:
– drink water, lots and lots of it
– eat some yogurt with probiotics to help your gut health
– try to avoid eating anything acidic such as tomatoes or citrus fruits for a while
– avoid over eating for a while

Those are my suggestions for you. 🙂