My DS was born breech and he never "dropped" at all until labor. Because he was never head-down I never felt that "bowling ball between the legs" that everyone talks about. But I assure you that when I went into labor, my cervix opened up just fine! I'm not sure how it works but it does.
In some cases with breech it's a good idea to delay pushing as long as possible even if you have the urge, to make sure you're dilated enough. In my case it wasn't an issue because I dilated all the way very quickly. My baby was frank breech and then switched to footling during labor and kicked his way out. It was wild.
Breech is a variation of normal, and I don't think it's enough of a reason in itself to schedule a c-section. (Although it doesn't sound like your doc is experienced/willing to help you with a possibly breech VBAC?) It's a tough situation. If I were in your shoes I'd do everything possible to at least wait until you go into labor on your own, as long as you and the baby are doing fine. Then if it ends in c-section you at least know your baby is ready to come out.
In the meanwhile maybe your baby will still turn! Have you tried an external version? It didn't work for me but does for a lot of people. If you do it soon with someone gentle and experienced, your chances of it working are good.
Best of luck! If you are curious about my breech birth experience, you can read my story here:Â
http://www.mothering.com/community/forum/thread/1158462/the-double-footling-breech-home-birth-of-zander-blaze