4 month old DD has started pulling really hard at my nipples, like trying to come off but still holding on to the nipple. She's also started 'grinding' them inbetween her gums and my poor nips are getting very sore now. I unlatch her when she does it, but I don't always stop her in time before the yanking starts. Is this just a pahse!? I've been using the Lansinoh when required, but I feel like we're going backwards with the feeding!