lalalallalallala pain

alright ladies time for my inexperienced post of teenage fuckery (quite literally) lately ive been feeling a strange pain whenever me and my boyfriend have sex. I havent exactly felt it before last week and weve been active for three months. its kind of a pinching, stinging sensation on that little rim of skin on the lower edge of my flower (yes I just called it that, I grew up weird) any idea what could be causing it? if so anyone know how to fix it?

p.s. I dont know if these are possible reasons why but we had a couple weeks of celibacy before hand, as well as my boyfriends a little over average.