Quoting Hannah & Aubree's Mommy**:" I layed there for a few minutes. We tried this almost everynight from 38 weeks on. I was trying to have ... [snip!] ... every night from 38 weeks on. It didn't work at all. I would cramp up for like an hour or two and then it woud just stop."
i cramp up too afterwards... but i read on some other website that that meant, at the very least, that my body is just preparing itself.
it was one person's opinion as far as i know, but i like to tell myself that's what it is lol.