Is she does not have a strep infection, or upper respiratory infection, antibiotics would not be necessary.
What you could do is go out to a pharmacy, buy some Chloraseptic spray which woill help relieve the pain. Also purchase some Gatorade or Pedialyte.
As she is in good health, that is less worrisome. My concern was that she might be frail.
http://www.chloraseptic.com/__________________