Hey Hunny

Sorry you are having a tough time atm. Firstly what I would do is decide on what type of care and birth that you'd most like to have.
I would also phone the birthing centre you spoke about, and just ask them how it all works (ie. When do most people have their apps, how often...etc). They will tell you in 30 seconds how everything works then you'll know and you can book as you need.
Or if you have private health insurance with mat cover, and would like one obstertrician that will look after you throughout your pregnancy and birth then phone around and just see what they all say. Again, ask them how it all works etc..

I'm sure after a few quick phone calls you will have it all sorted.

Good luck.