HELP! What should I do ? Vbac rights ?

Lilly

I'm currently 35w3d and I will be trying for a vaginal birth. I'm a good candidate... however the doctors office I've been going to has told me that there is one doctor who does and will not do Vbacs. So if by chance I go into labor and she is the one on call, they tell me that I have no other choice but to have a c section. I want to know if anyone has any advice or could tell me my rights ? Could I refuse ?