Give light meals more frequently,including curd and Banana in the diet in addition to whatever you prepare at home. Give ors after every loose motion if watery. Use paracetamol for fever and repeat every 4 hours if required and syp anafortan for stomach ache. If not improving OR accompanied by other symptoms like vomiting or abdominal distension or dullness and refusal to feed,consult your paediatrician for physical examination and treatment.