A.R.
There are teething tablets called Hyland's that you can find at Meijer or Walgreen's that are homeopathic. Also, freeze a wet washcloth and let her "chew" on it or try an ice cube in one of these: http://www.babysafefeeder.com/ (I think Walmart and other stores have something similar in their baby sections now as well.)
It does seem very early for teething, but it's not unheard of. I've heard that it's rare but some babies are actually born with teeth!! Take her to the ped if you think there might be something else going on. Trust your instincts!!
-Amanda