Thanks for your query.
Your child is having fever
for 3 days with pain abdomen and loss of appetite.
It is mostly viral in nature,but needs to be evaluated.
I suggest you to get her examined by pediatrician
for proper management.
In the meantime record temperature every 6 hourly and give acetaminophen
as per dosage if fever is more than 100F.
Maintain proper hydration,give plenty of fluids,glucose
water,fruit juices,vegetable soup.
Do not force her to eat give fluids only till her appetite returns.
Wishing your child good health.