Breastfeeding

So I am about 16 weeks PP. I had a period back in the beginning of February. I feel like I should be getting another one anytime now because I have had terrible cramps and it’s been over a month. But my question is when you get your period back, does your nipples become ultra sensitive when breastfeeding? My nipples hurt so bad whenever LO latches and it’s never been like that except in the beginning. (I’m also not pregnant. You’d have to do the deed to get pregnant and the deed has not been done lol)