Last night when I was nursing on the left side it felt like my daughter kept biting. I kept trying to reattach her but it felt the same. From what I could tell her latch looked pretty much the same or simular to always and she was definately sucking happily and not biting down like she has done when she is not too excited ot feed or overtired. The right side felt fine and when I nursed her in the rocker before I left for work it still hurt. I tried to examine her latch but I could not see anything she was doing wrong. It was difficult to see her tongue but sometime I think maybe it is. She kept looking at me like why to you keep interupting me I am trying to drink my yummy milk. She currently has 4 teeth 2 top and 2 bottom. the side ones are coming in at present. Has anyone had trouble when these come in? Also I am wondering if maybe it is an infection or yeast that might feel simular to a problem with teeth. I am going to go [pump now and see if that hurts too.