Thanks for posting query.
It appears to be a case of gastro esophageal reflux disease
or gastritis or peptic ulcer disease
Follow the advices properly-
1. Try Proton pump inhibitor with domperidone
combination and Take enzyme preparation tablet.
2. Take food that will not produce gas like avoid more carbohydrate
and fat containing food.
3. Avoid late night food.
4. Do not sleep for 2 hours after consuming food. .
5. Upper GI endoscopy, stool examination and blood tests are hard to tell exactly about your condition.
Consult with physician for further proper management.
Wish you a speedy recovery.
Dr Sourav Ganguly