In this condition it is important to keep yourself well hydrated( take plenty of fluids like water, coconut water, ORS solution) and take only home food(more of curd rice). Start on probiotics tablets like capsule vibact, twice daily after food, for 5 days. If the condition doesn't improve in two days or it gets worse, kindly consult a general physician for further evaluation. You might need oral antibiotics to control the infection.