Hi.
Thanks for your query.
Noted the history and understood your concerns.
Your detailed history is suggestive of acidity related problems like 
gastritis, GERD that is 
gastroesophageal reflux disease. gases and may be intestinal issues.
Hence I would advise you the following:
First of all get an Upper GI Endoscopy, 
Ultrasound of the whole abdomen and tests of blood, urine and stool.
This will give the correct diagnosis and a plan for proper medication.
Also needed is the following:
PPI like 
Omeprazole.
Motility regulator like 
Domperidone.
Antacid every three hours particularly when on empty stomach.
Soft bland diet with small frequent feeds.
Reclining position of dinner.
Control over stress and anxiety.
All these will give you relief and also help to have additional management.