Possible contractions and not realize it?

I am 38+2 and as of Monday I was almost 3cm and 70% effaced. I have been having little twinges and minor cramp like pains on and off for awhile but nothing to make me stop and say wow! I don't even think I have any Braxton Hicks, that I have noticed, but obviously I have had some contractions at some point if I am dilated right? Just curious....really hope the baby waits until next week, don't want a X-mas b-day!