Hello,
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Abdominal pain can be due to various reasons as:
1)GERD or Reflux Oesophagitis -- It should be relieved by intake of antacids as Tums.
2)Stomach or Duodenal Ulcer- The pain is related with food intake. Does the pain increase on intake of food or reduce with intake of food?
3)Enlarged liver - It can be ruled out with Ultrasound of abdomen.
A detailed physical examination and investigations as USG scan and Endoscopy would help to rule out the cause.
Take small frequent meals and avoid fatty,spicy food intake.Drink lots of water and consider visiting a Physician for evaluation.
Take care!