You could actually be like that for weeks.. then again every woman is different. I am 38+2 and went to my appointment today and I'm still the same as I was a week ago- 3cm and 70% effaced so I was pretty disappointed I haven't made much progress.
try eating fresh pineapple as well, walk a lot, red raspberry herbal tea, sex and much more....
good luck! :)
I agree with sarahkr....could take a bit still. Good luck!