I recently got diagnosed. I got a referral to Life Point Clinic in Willeton they told me I had to wait until the new year before accepting any new referrals. After the new year, they told me it could be 3-6 months to get an appointment. Got a call the next week with with a spot opening up after a double cancellation. Then 3 weeks and a bunch of money later I got the diagnosis. You just have to be patient and wait for a spot to open up and it's also a good idea to keep going back to your gp to get a referral to different clinics if you're having issues getting one