Thank you for your query.
Since when you have above mentioned symptoms? If lasts more than one month , then you need properly investigation for definitive diagnosis. You can try adjust your diet, choose carefully your meal, may use antacids oral rehydration salts that can get over counter in nearest pharmacy. But I would advice you Gastric Endoscopy
with biopsy( to rule out Helicobacter Pylori infection
), Laboratory investigation( complete blood count
, lipase, Liver function test, Coproparasitologic exam ), then will be clear regarding your condition.
I wish you speedy recovery,