It because it makes your muscles contract!! It effects u diffently once u r pregnant and as ur baby gets bigger. at the becoming of my pregnancy I couldnt do anything sexual it hurt me. but now I can and just have the hard stomach with some cramps. it might be lasting hours for u due to dehydration.
im 39+1 and it happens to me my stomach also gets real hard
It gets worse toward the end, I'm 37 weeks & it happens more than before
I sometimes get sine pretty bad crampy pain after particularly strong orgasms, but they go away after a couple minutes. It didn't start doing this until my third trimester.
This happens to me aswel, im guessing it's pretty common (29+6)
I get it sometimes still and I'm 17 weeks
Its normal for me, how far along are you?
that used to happen in the beginning of my pregnancy . but only for a few minutes . maybe you should ask a doctor just to be sure .