Hello, Thank you for your query. Would you clarify a few things for me please? *what is your height and weight? *how old are you? *do you smoke or consume alcohol? *do you eat out often? *how much is your caffeine intake? *Do you have any other medical issues or take any medications? As you have met your cardiologist and done a stress test and it was normal, the next probable cause is gastritis or peptic ulcers. This commonly mimics heart trouble. I recommend : -home remedies : have smaller but frequent meals :chew food thoroughly :avoid caffeine on empty stomach and minimize sugary, carbonated and caffeinated drinks. :avoid, spicy and oily food :avoid processed foods & refined grains. :drink plenty of fresh water (if not medically contraindicated) :avoid eating full stomach :do not lie down for two hours after a meal -take pantoprazole 40 mg twice a day a half hour before meals in the morning and at bedtime. Do this for 3 days, the reduce frequency to once at night. If it still persists, see a gastroenterologist -an endoscopy -stomach mucosa biopsy if ulcers are present. Hope this helps and you feel better. Please let me know if there is anything else I can help you with. Wish you good health