Hi.
Thanks for your query.
Noted the history and understood your concerns.
3 weeks is a long time to suffer from belching that smells like rotten eggs, cramps and frequent bowel movements. Although it stops for a few days it is recurring.
All these symptoms can be due to the following reasons:
Gastroenteritis due to any cause
Sub-
acute intestinal obstruction.
This can be diagnosed by the following:
Stool test for a few days consecutively.
Tests of blood: CBC, sugar, thyroid functions and as needed as per the clinical picture.
Get an appropriate management with antibiotics, PPI like
Pantoprazole and
Domperidone.
If required further go for the following investigations under the care of a Gastroenterologist:
Upper GI Endoscopy.
Colonoscopy.
CT scan of the whole abdomen.
Additional medications as per the findings.
Boiled and cooled water, only homemade foods since you are getting recurrent problems.