Hello there
Give her ORS around 3 litres a day.
Normal home cooked food only.
Start Tab Ciplox TZ twice a day after food and carry on for 5 days.
Tab Calpol 500 thrice a day for fever and body ache.
Next Steps
If she is too weak, or having any other problems like very little amount of urine, breathing trouble etc see a doctor immediately for further advise.
Health Tips
Diarrhea with fever and body pain may be symptom of diseases affecting body systems other than the digestive tract also.