According to your symptoms you are suffering from reflux disease . Thee is regurgitation of food and acid from your stomach to your esophgus . You need modify your lifestyle along with need to take pup medication for long time.
Next Steps
Improve lifestyle
Small frequent meals 5-6 per day
Moderate excercise
Avoid oily spicy food
No smoke alcohol ( if you do it )
T nexpro rd 20 mg bd for 2 weeks
Duration between your meal time and lying down should be 2-3 hrs