Anyone fall pregnant whilst BFing?

7.5 months of breastfeeding.

No period yet!

Last few days I've had bad cramps where my whole uterus is sore, & super sore nipples whilst breastfeeding. They feel so tender & sensitive! We have been having sex 2-3 times a week. The cramps started the day after a bit of a rougher nooky lol.

Anyone else have this & end up pregnant ?