Hey hun, ow dear i think it was my fault and i got you all worried...STOP! It s true, unless you ve had a second trimester loss or a d&c very close to the time of your pg they dont usually check. I have to remind you that with my son my doc never checked my cervix and he went full term. It was only after two d&c s, one being only 1 month prior to me finding out i was pg again thay he decided to do an elective cerclage. And again, at 15 weeks it is highly unlikely that your cervix has shortened, the baby s weight is very little to cause any changes to your cervix, so waiting another 2 weeks is no big deal really. Just ask your ob to check as a precaution in two weeks...if it s noy standard procedure then you can claim you want it checked due to having a bu. please please please stop worrying and driving yourself crazy, ic in most cases becomes an issues after week 20 when the baby s weight increases substantially.