How soon did you go to the L&D room?

Isamar
So I am 41 weeks!! This is my second baby. And I've been having contractions for the past 20 hrs they've been anywhere from 20-10 mins apart at times 8-12 mins.. 
How soon did you leave to the hospital? 
I'd hate to get there still not be dilated enough and be sent home.. My plan is either to wait for my water to break or wait til I cry my lungs out..