Thank you for your query on Healthcare Magic.
Your child seems to have a viral fever
For fever you can give Tylenol
in prescribed dose every 6th hourly depending on the presence of fever.
Give plenty of oral fluids and water to maintain her hydration.
Stomach pain may be due to gastritis
and medications like antacids which are available over the counter can be given if the pain is severe.
And consult the Pediatrician
for physical examination and to look for any focus of infection, treatment.
Hope I have answered your query.