Hi, many thanks for the query!
Nothing much to worry, you need to do certain investigations- Stool (Culture & Microscopy), CBC, Sr. Electrolytes, USG (Abdo-Pelvis).
Take antibiotics, anti-spasmodics, antacids, pre- & pro-biotics as per reports & your doctor's opinion.
Drink plenty of oral fluids specifically those containing salts like ORS
Get physically examined by your doctor, per rectal examination
& proctoscopy needs to be done.
Wish you a good health.