As of now it looks like a gastritis
but if she starts having diarrhoea
then she would be having gastroenteritis
.When she wakes up give her an antiemetic ;that should stop her vomiting
Also keep her well hydrated and give her a light diet .
If she starts with loose motions then give her a probiotic
or yogurt.Again keep her well hydrated.
Most of the times this could be due to a virus and would self correct in a few days .if she starts running fever then get in touch with a doctor.