I'm nervous!
It is a big deal and I am sorry that you had to change doctors. Just when we get all geared up for something, it feels like a rug was pulled out from under us.
However, I have found that when there are unexpected changes, God's hand is usually directing that change. Trust that God is holding you in His hands and that this is His perfect will for your life.
I too have a date in December - I guess we can waot together. I will be praying for you!