The symptoms you are experiencing might be related to:
- possible intestinal infection (run examination of stool for ova/parasites; culture of feces for bacteria and candida)
- food intolerance
(run malapsorption tests)
I also suggest to do abdominal ultrasound
and to consult with GI specialist for further evaluation.
Meanwhile, I'd advise to:
- keep good hygiene measures (wash hands before cooking or eating)
- always wash your vegetables and fruits with thorough water
- avoid eating foods that make your symptoms worst
Hope it helped!