Not much advice to give.

But I know how you feel. I had a retained placenta with my son's birth, I was also hemorrhaging and needed surgery for a very large episiotomy so it was off to surgery for me.
But they spent an hour trying to get the placenta out. They used syntocinon and pushed and pulled with everything they had. I remember it as much more painful than the rest of the birth. It's not an experience I'd like to repeat.
Of course mine was a different story and I needed the surgery for other reasons as well, but it's really interesting to hear that you can wait longer for the placenta to come out. Something I'll discuss with my midwives next time.