I have had pitocin, and would refuse to use it again, especially having had a c-section. A lot of doctors use pit induction for a VBAC, and many of their patients end up with a repeat cesarean. I would keep pushing, and if I was going to induce or do a repeat cesarean, it would be as a last resort and certainly not at 40 weeks.
Something we seem to have forgotten in today's schedule-oriented society, is that 40 weeks is just an average. It used to be that anything from 38-42 weeks was considered full term, but these days OBs give us a very small window with which they are comfortable.
My oven cooks at 400 degrees, as does yours I'm sure. But, it may take an hour to cook something at 400 in my oven, that would only take 45 minutes in yours. Recipes even account for the fact that times may vary depending on the oven. Why can we understand that and go on without question, but insist that something so much more complex, like the human body, has to be ready to deliver in exactly 40 weeks?!