cramps after sex

ok so my new partner used a dildo to fuck me a couple days ago and it was hot as fuck but also a lot bigger than anything i’ve had up there before if you know what i mean 😂😂 but i’m getting these like period type cramps/stabbing pain in my like uterus area i guess? is this from sex or am i dying

(also i don’t have an iud or anything, i’m just on the pill)