Hello dear
I understand your concern
Your symptoms could be due to 
stomach ulcer, 
indigestion and 
acid reflux.
I would suggest to consult the gatroenterologist and undergo following investigations:
blood tests like CBC, ESR, LFT, endoscopy, 
urea breath test.
Meanwhile take following advises:
Tablet esmoprazole  30 minutes before the meal for 14 days 
Syrup mucine
Avoid stress and do regular exercise like walking and yoga
Take more diet like banana, rice, applesauce, yogurt, buttermilk and toast
Avoid spicy/oily/fatty food
Take small frequent meal rather than large meal
Hope this may help you
Contact HCM for further health query
Best regards
Dr. Sagar