Pain In the Bedroom? Slight tmi...

Caitlin
I'm 5 weeks and 3 days and last night, during our sexy time, I was cramping so badly after an orgasm. And the cramps didn't stop for about 10 minutes. 
Is this normal? I'm thinking it's probably all the extra blood flow to my uterus because of the baby, since it's simply cramps, but I wanna see who else has had this. 
It kinda ruined the moment too, haha. 🙈