Thank you for the query.
The reason of such symptoms can be severe intestinal infection (caused by amoxycyllin), bowel partial obstruction due to inflammatory bowel disease
, fistula between small and large intestine, pancreas
disease or even a cancer.
You can try a Rifaximine 400 mg 3x1 for 7 days treatment (should be prescribed by your doctor) and if it wont help, than you should have some tests. Full blood work, liver tests, amylase, bilirubin
should be performed. Abdominal CT with oral contrast should be done next and if still no findings, colonoscopy
should be performed.
Hope this will help.