This discomfort can be due to gastric ulcer or oesophageal reflux(food reflux back from stomach into lower esophagus
).You just have to do following measures:-
1-Dont eat too much at 1 time rather have short meals.
2-Avoid spicy things.
4-While sleeping use 2 pillows under your head.
You can take also take medication
1- Cap omeprazole
20mg once daily
I hope this will help you. If the symptoms doesnot resolve in 1 week consult your nearest doctor