K.D.
My daughter did the same thing a few times (even drew blood once) and when she did, I broke the latch, told her "NO!" and then ended the feeding completely. I did notice that she only bit me when it was the end of the feeding so that may be the same with your daughter. I think once my daughter understood that biting meant no more milk, she stopped. Like I said, it only happened a few times.
I hope it stops quickly because I know how painful it can be!