Welcome to HCM
Your description is more like hyperacidity
and reflux disorder, but it is better to exclude cardiac cause so get a ECG first and if every thing is fine,some antacid
or Omeparazole like drugs may be taken with consultation of your Physician.
Later on you may go for a Tread mill Test.
Please avoid taking oily and heavy meal in dinner have a walk after taking meal.
Take sufficient amount of water and by chance if you smoke and drink alcohol please avoid as they make condition worse.
If you are not comfortable with drugs plan a upper GI endoscopy
to see condition of stomach and upper G.I.
A test for H.Pylori and if positive triple therapy may help you.
In the mean time also take prebiotics
and probiotics to improve gut health.
Good Luck to you