Tasha, unless there is something very unusual about your anatomy that we are not aware of, your OB's advice and actions sounds really strange. I think I would be looking at a second opinion, and perhaps a new OB. A c-section at 39 weeks for an unengaged bub sounds really bizarre to me. And a c-section at 40 weeks for no other reason but that you haven't started labour yet is ridiculous, I think!
Do your own research, and then make a decision. There are some excellent articles here on BB that can provide you with some information on c-sections and VBAC. All the best!