Hi,Dear,Thanks for your query to HCM.
Dear I read your query and reviewed it with context to your query facts.
I understood your health concerns and feel Concerned about them.
Based on the facts of your query, you seem to suffer from-
GERD with Heart flutter from 
Esophagitis and 
Gastritis with accompanied ?EnteroColitis.
Reasons-
You need to rule out the various factors which create this complaint complex-  and which is mostly due to-
Outside-hotel/street food eating frequently,
Excessive Tea,Coffee,
smoking,alcohol intake.
Spicy,fried food frequently.
Stressful life/lac of sleep and rest for 8 hrs a day.
Accompanying Medical conditions-like hyperthyoridism with 
thyroid storm,SVT,Atriall 
fibrillation,sliding hernia, etc.
Neglect to stomach pains and mouth soreness, which accompanies these complaints and this lifestyle.
EGD, may rule out esophageal/Gastric/duodenal  causes for this complaint complex in you.
Hope this would help you to solve your health issues in the best way possible. 
Welcome for any further query in this regard.
Good Day!!
Dr.Savaskar M.N.
Senior Surgical Specialist
M.S.Genl-CVTS