Nipple biting :(

Sh
Any other May mama's baby's really into chewing all of a sudden? My daughter is 5 months old today and this past week she just sits there and chews and then when I'm nursing her she will chomp down on my nipple and it hurts so freaking bad. She has done little bites before but lately she's hurting me so bad! Ugh I'm thinking about just giving up on nursing and exclusively pumping. Here's a picture of the evil little lady lol