Low cervix?

Okay this really might be a dumb question so don’t judge me.

Whenever my boyfriend I have sex it’s fine, it’s great. LIKE AMAZING SEX. But usually a week before my period it just hurts in my lower abdomen. It’s like he’s hitting my crevice and this only ever happens when we have sex when im days away from my period.

Does your cervix lower when you’re about to start your period. I know that it does for like pregnancy and ovulation, so I guess that means it does for your period too? I realize this is probably a common sense question, I’ve just never really thought about it. I’ve just started noticing that with my last few cycles we’ve had sex when I’m days away from my period and it hurts.