my heart beat increases very often and i feel uncomfortable. i feel heaviness in my stomach. i also have a gastric problem i feel. because i feel soffcation in breathing and heart burning as well.  what could be the reason for heart beat increasing. recentlyi had my ECG done and it was normal. is this something which i have to be more cautious about?
Hello! Thank you for asking on Chat Doctor! I understand your concern, and would advise to rule out any possible triggering factors for fast heart beating, like anemia, thyroid gland dysfunction, other organ dysfunctions, etc. I recommend performing a medical check up with a careful physical examination, coupled with some blood tests (complete blood count, thyroid hormone levels, chest X-ray study, liver and renal function tests, etc.). If any suspicions for abnormally high heart rate is raised by the above examination, then an ambulatory ECG monitoring would be advisable.  If everything result OK by the above tests, and only normal sinus tachycardia is present, then an investigation towards diagnosis of anxiety should be sought. Hope to have been helpful to you. Greetings!