With my first I was dilated 1 cm for two weeks before my water broke, but then I was only 4 days early. You can be dilated for 1 cm and then go straight to 4 in a day, or you can be 1 cm for weeks before anything happens. Unfortunately there are no real clues as to when birth will happen, kinda like symptom spotting during the 2 week wait, haha, you can symptom spot all you want but nothing will tell you until you start having real contractions (or water breaks). Not trying to be a downer, i just remember the last couple weeks last time seeming way longer because I was convinced it would come any day and it didn't!