Pinching & squeezing nipple while BF

Sa

My 6 month old recently began squeezing and pinching my nipple while breastfeeding. Right when she begins before my letdown occurs she will suckle then talk to my nipple then EEEEEK pinch or squeeze!!!!! It hurts terribly bad. I sternly told her no today and she laughed 😑 just didn’t know if anyone else was going through this or has a solution.