harlee, I know you're in Oz, too, so just to recount my experience with tests...
My GP saw me, sent me to the lab the same day - I got the blood drawn. The results were back in just a few days - no more than a working week. Then when I saw him exactly a week later, I got my first prescription.
Not all docs request bloodwork for some reason. I would imagine that a specialist like an endo would require it, but in my experience and with my local pathologist, the results were back in less than a week.