Honestly, I would tell your Ob to stick his c/s up his bum. Do you know what the chances are of going into labour naturally before your due date? Not great, so he is effectively just p1ssing in your pocket when he tells you that he will let you have a VBAC provided you go into labour before your due date (I notice your EDD in your sig is 24/4 - so is the may 1st date his or your's?) and has basically taken away any chance of you having a VBAC. What was the reason for your first c/s? If it wasn't anything to do with your body, then there is a great chance that you will be able to vaginally birth your baby - if you are given the time to let your body do its thing. I would be demanding another week to give it time to happen on its own if I were in your shoes.