First let me say that PD is usually diagnosed through observation over a period of time. Are you seeing an MDS (Movement Disorder Specialist)??
Dr.Peter Silburn in Brisbane is a good one, as is Paul (can't think of his last name!!) at North Shore Private Hospital in Sydney.
You can get a PET scan that will indicate whether you have PD or not. Not sure if they are offered in Oz or not. If you private message me, (top right of the page) I can tell you about support groups, people to talk to, doctors etc. Include your email and where you live.

Charlie
DX'ed w/ PD 1990 @age 40 . DBS/STN in 2002 at UCLA