No, sounds like your body is just getting ready for the big day.
Today I had an ultrasound colour doppler everything was fine in it but now I swear my vagina has streched or dilated even my husband felt that..is this a sign of pre-term labor?
Sounds like braxton hicks to me!!
I would call your doctor, you may have a risk for preterm labor of they're bad enough. Or everything could be fine. Braxton hicks are your body getting ready for the real contractions and labor.