Panda - one thing I have found in all this is that most places are reluctant to tell you anything and very few of them do anything without persistant pressure from you. Its frustrating and SO wrong of them - especially when we pay the money we do!

My suggestion would be possibly have a look on the net to see if you can find someone in Aus who specialises in the exact problem you have (is it low progesterone?) and contact them - even if they are not nearby they may know someone who is and may be able to suggest to you what the best next steps are... I found that when you tell a doc that you are considering going elsewhere suddenly they start to show an interest - funny that.

Good luck with it and I hope you find some answers...