No need to worry.
You should get her evaluated once for her complaint to get her examined physically by a pediatrician
in > 102 and TLC >1700, its indicates Bacterial infection.
You have to do complete fever profile with Chest X - Ray.
After investigation your pediatrician will proscribe appropriate Antibiotic that cover infection.
I would advice:
Plenty of water to keep your baby hydrate.
Soft and liquid diet
i wish will recover soon
Regards Dr. Sagar Mhatre