In case you're having severe Gastritis/ Acidity it's better you repeat Endoscopy and H.Pylori testing. Till then continue ppi like Pan 40 or Nexpro 40.
Next Steps
Consult a Gastroenterologist
Health Tips
Avoid spicy meal, oily food, nonveg, outside food, coffee, alcohol if any.
Avoid sleep immediately after food.
Do regular exercise.