I had the same thing with both pregnancies - my first being the "worst" for that, starting consistently at 32 weeks, every 5 minutes. I have been told that I have an "irritable uterus." I wound up having to go in for NST's every 3 days for the next 7 weeks, and was on bedrest.
With #2, I pretty much ignored the contractions until they became stronger a week before she was due. Then I was in progerssive labor, but it was slooooooow for 7 days.
Hoping this one goes more smoothly for you, and me too!