Hi Sue,

I've had exactly the same thing over the past few days, I called my OB's office and they got me to come in, and my OB sent me off for an ultrasound to check my cervical length. It might not mean the same for you, since I have some congenital abnormalities which mean I'm at high risk of preterm labour, so my OB wants to keep a very close eye on my cervix for incompetence. The US did show that my cervix has shortened, so I have to go back for another scan next week to recheck the length, if it continues to shorten I may have to go on bed rest and possibly have steroid injections to help bub develop faster if he/she comes very early.

Obviously this is just my specific situation, your cramps could just be your uterus still stretching, but if you are concerned, you should call your OB/GP/whoever is responsible for your antenatal care, they should get you to come in to be examined. It's just not worth stressing out about it (even if it turns out to be nothing) or leaving it when it could be something serious.

Good luck, let us know how you go!

P.S - I've been getting some Braxton Hicks too, but like you say, it was completely painless, just a squeezing, tightening sensation in my uterus. These cramps were quite different, like period pain, also accompanied by a heavy, 'pressure' sort of feeling down very low.