I have had 2 posteriers babies. One was vag birth - and a labour I will never ever forget due to the back pain. He was born within 8hrs though.
Other resulted in C section as his head was flexed backwards aswell, so after 25hr labour, I had emergency C Section.

My back has not been the same since the first one. I would definately be trying to turn bubs.

I hope your birth is quick and relatively painless.