I was going to mention to Gwamma (and I think even another poster who asked about it) that a while back I took something called "Raw Thyroid", which I got at a local health food store. It has a few other glandulars in it, including adrenal, I l believe. It's not too expensive and my trying it was what convinced me that I DO have a thyroid issue. I felt instant positive results with it. I did get a little nervous and only took it for a couple of weeks since it was impossible to know how much T3 I was getting and I knew I needed to get to the doctor for testing, etc. However, it was a great little experiment and I got the feedback I was looking for. I know you're in NZ, but I'd be surprised if there wasn't something similar where you are - it may be worth a shot.
Keep the good stuff coming, YB and Co.!