Hi
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Get pancreatic and liver enzymes done. Also possibility of acidity, gastritis, GERD, and gastric reflux is there and an endoscopy may be required. Take Omeprazole empty stomach in morning and an antacid gel at bedtime. Refrain from smoking, alcohol, fuzzy drinks, caffeine, and spicy food. See if this helps.
Consult a gastroenterologist. Take care!
Go to medicinenet.com and look up chronic pancreatitis. See how the information lines up with your symptoms.
You could also look up hiatal hernia too.
Having solid medical information will help you to present your case to the doctor so that he will 'hopefully' realize that you are in earnest to discover what is wrong.