Thank you for your query on Healthcare Magic.
Your child seems to have a viral illness with the features of gastritis
For fever, you can give Tylenol in prescribed dosage.
If there are vomitings, you can give an anti emetic like ondansetron
in prescribed dosage.
Maintain her hydration by giving sips of oral rehydration solutions like Pedialyte
, coconut water, and lemon water.
Monitor her hydration status.
If the problems are persisting, you can consult the Pediatrician
Hope I have answered your query.