Hi L.,
There is no set pattern for everyone. I have had 7 and I've never dilated early with any of them. However, I did have very strong braxtons with many of them, to the point where I thought I might be in labor. Also, lots of pressure and discomfort from baby being so low in my later pregnancies. I have friends who were dilated weeks early and still spent hours in labor when they finally went in, while I was never more than 3 cm arriving at the hospital and was delivering in just a few hours. So there's no way of knowing. But take heart -- you're almost there. And at this point, they must be checking you every week, so you'll know where you stand. Good luck.