Hello dear,
The symptoms as mentioned in your post is attributed to either infection or inflammation in the Gastrointestinal tract.
Presenting with such symptoms, I usually treat my patients with:
1. Tablet 
Pantoprazole + 
Domperidone twice daily (to be taken half an hour before food)
2. Anti spasmodics like 
Dicyclomine preparation twice daily (to be taken after food).
3. Antibiotics like Ofloxacin+Ornidazole preparation twice daily (to be taken after food)
4. Oral Rehydration Solution (ORS) for maintaining the hydration status of the body.
5. Take soft, plain, non-spicy foods
6. Avoid fast foods & gas producing food products like cabbage, etc.
If symptoms still persist, it will be better to 
consult a Gastroenterologist & get a proper physical examination done to find out the exact cause.
Investigations like 
complete blood count, stool examination & Ultrasound scan of abdomen will be helpful in detecting any pathological cause for the symptoms.
There is no need to worry, you will be fine.
Wishing you a good health.
Take care.