Thank you for the query.
The most probable reason of her symptoms is gastrointestinal infection
due to food poisoning or regular indigestion
. Most of such cases does not need medical attention and heals by its own. So I suggest you to do not give her any solid foods for 12 hours and give plenty of liquids.
If the symptoms will go away, she will be fine.
But if high fever
, blood in stool
will appear or the symptoms wont go away within 48 hours, you should take her to the doctor.
Hope this will help.