I'm refusing sweeps until labour has started, and possibly after that still as well. Did with my first and second too. I'm very much of the believe that if your body is ready it doesn't need the sweep, sweep will only try to force it when it isn't ready and lead to things like unproductive contractions.
That said, both my labours I've had 2 and a half days of contractions before hitting active labour. Contractions would be anywhere from every 3 minutes to one or two an hour. Usually around 1 every 8 to 10 minutes, doing not all that much for dilation. Both times it's taken me 2 and a half days of contractions to get to 4cm. With my first I was then put on a drip to speed things up, with my 2nd I was left to rest and went from 4cm to having given birth in 2 hours time.
Aaaaanyways! Had my midwife appointment today. Little lady is no longer back to back, yay! She's engaged, but only a little bit (I can feel her bob in and out of my pelvis). Midwife seems to think I won't go into labour within the week, so looks like I'll be going over nicely again like I did with DD2