Just letting you know my SIL had the same problem and just moved to Stanhope Gardens. Westmead wouldnt let them book in due to being out of area even though Im a midwife there myself. So she booked into the birth centre at blacktown and the middys there aer fantastic, she is really happy so far (baby due in January). I also had 2 babys at blacktown, many years ago though, and recently a baby at westmead and I never had any problems with Blacktown. In fact I can tell you this from an insider- westmead does way too much intervention and Id have to say Blacktown has great staff (yes there is always one bad one Im sure).
Id ring up and speak to the staff in the birth centre at Blacktown and go there, its suppose to be very nice and you dont have to stay in hospy for very long afterwards, infact I went home early and had midwives come to my house which was much better.
My SIL also goes to the aquanatal classes at Stanhope gardens if your interested.
I hope this helps