According to your saying and clinical data you are providing, they are most likely related to GERD
( gastroesofageal reflux).
You should make an upper endoscopy
and an abdominal ultrasound
to be diagnosed accurately.
You should make some changes in your lifestyle and diet habits as following:
try to avoid spicy food
try to eat small amount of food each meal and often
try to eat your dinner at least three hours before you go to bed
losing weight is another factor with positive impact
try to raise your head more while you sleep (preferably 2 cushions)
Starting PPI's ( omeprazole
20mg twice daily ,30 min before food) can also improve your symptoms
I hope this will be helpful, you can ask again if you still have problems.