Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
It is good to know that you have all the screening test for coronary artery disease done & they show normal reports. Irregular heart beats can occur in a normal, healthy heart in conditions like while doing exercise,
electrolyte imbalance, stress/anxiety or
nervousness. Too much nicotine or caffeine intake may also cause it. Visit ER and get T3, T4, TSH done.
Hyperthyroidism (overactive thyroid gland) can cause irregular heart beats, AF. Since you have history of
gastritis, take Fiber in your diet, drink plenty of water avoid
constipation. Constipation triggers gastritis & causes discomforts like you have been experiencing. Remove irritating food from your diet, stop taking oily spicy junk food. Prefer home made food over food from outside. Take antacids & Pantoprazol-40 once daily for 5 days for relieve.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Nupur K.