C.L.
My son's started coming at 5-6 months so she just could be an early one. Things that saved me:
Frozen washclothes for them to chew on, piggy back tylenol and IBuprofen when she is really bad and try some Hyland's Teething Tablets (usually found in pharmacy's). The tablets are homeopathic but work great. Good luck and bear with it-it probably won't stop for a while once it starts.
C.