Cramping during O?

Not sure if this is exactly the right group for this, but here goes:

I'm about 6 weeks along, and for the past few weeks I've occasionally had sexy dreams which end with me waking up to a glorious orgasm. Or, it would be glorious if there weren't also cramping pain going along with it (like menstrual cramps). The cramping thing is definitely new since getting pregnant. I wondered if this was maybe just a dream-time issue, so I tried it out fully awake and sure enough--cramping with orgasm.

I haven't had any bleeding or any other signs of things going amiss, and I know occasional cramping is normal, but I literally get cramps every time I orgasm. Which SUCKS!

Anyone else ever have this problem? Did it eventually stop? If so, when? If not, how did you deal?