My daughter is almost five months old and is just occasionally nursing (I've been pumping since her birth due to issues, she took to nursing later). Well lately she's been latching on and then pulling her head back really quickly, practically taking my nipple with her! Ouch! It really feels like she's going to pull off my nipple. Is there anything I can do to stop this? She doesn't have any teeth yet but man she sucks really hard. Thank you!