Cramps during sex 😁🤕

Jess 🦄
So, I've had sex twice and every time he gets to a certain depth and I get the sharpest pains and cramps 😩 he's not necessarily large, probably just above average! But he can barely get past half way before it hurts 😓 it's not that I'm not turned on or not lubricated enough or I'm too tight, I think it might be my cervix but it would be really shallow 🤔 
anyone got any advice?!? It's ruining the sex 😞