This is Dr. David
peppermint is a bad idea which can relax your GE sphincter and allow stomach acid to come up your esophagus.
you could have excessive stomach acid cause gastritis inflammation.
you might need strong stomach acid blockers like prilosec or nexium or protonix to help decrease stomach acid.
or it could be due to pancreatitis
certain foods like spicy foods, fatty foods, alcohol, fried foods, tomato sauces, oily foods can worsen stomach acid and cause gastritis.
you should see a doctor and see if stomach acid reducers can help your symptoms.
changing your diet could help your symptoms.
you need blood test to check your amyase and lipase levels to check your pancreas
let me know if you have questions.