Don't worry, when you slowly dilate before active labor it makes the whole labor process go faster. Until you are active labor and are not dilating you have nothing to worry about. Some women don't even dilate until after labor really starts kicking in. Every body is different just remember that your body was made to do this and it knows what its doing.
I think once u hit 5 they put u in to finish...they can break ur water to move things along.