Welcome to HCM,
As all reports normal, it seems that you are having hyper acidity or Gastritis
Take Pentaprozole or Famotidine
twice a day for few days and observe
If you feel better the continue the medicine.
Avoid fried, chillies and junk food.
Take milk, curd, rice, buttermilk and ice creams.
Still pain of chronic pancreatitis
should be ruled out.
Ok and bye.