Help! Sore nips - teething?

How old is she? If after 2 months I agree could be teeth. But when you feel her latch change take her off the breast. That way she can't bite. But the first time my daughter bit me I screamed. It scared her so bad. She wasn't a biter.

Sorry, should've mentioned she's 12 weeks old today (3 months on Valentine's Day)

Is it possible your cycle is returning? When I ovulate, nursing really hurts.

My dd started doing this around 2 months. She was trying to stimulate a letdown.

@Mel - That's a good point...I don't think I'm getting my period just yet, but I (regrettably) started taking the mini pill at the start of last week and stopped after a few days, but my midwife told me it takes effect within 48 hours so I'm thinking I have had some hormonal affects.