Hi, Due to excessive production of gastric acid in stomach, reflux of gastric acid occurs into esophagus which causes heart burn sensation and upper abdominal pain. Usually antacids will give immediate relief. You can take antacids along with proton pump inhibitors will reduce your heart burn sensation and stomach pain. And take regular food at regular time, drink water, avoid spicy food and outside food ,non vegetarian food . Drink more water, take green leafy vegetables in diet, take banana after food. Go for ecg test , endoscopy if needed. Consult general physician for furthur evaluation and treatment.