My OBGYN would let me go past 42 weeks because she thinks that the placenta stops working properly at that point. I haven't really been 42 weeks or more pregnant. The longest I could go with the last pregnancy was 40 weeks at which point, we went in for me to get induced and my baby was born the next day.
I had an epidural before the baby was born and before it was time to start pushing. My water broke as I was getting an epidural. The baby was born about 24 hours from the time I got induced. Good luck, and I hope that it works out for you. I haven't really known anyone who was 42 weeks or more pregnant.