I'd get the Amalgams out ASAP over the course of the next few weeks/months/years.
I would recommend a hair test & blood candida test(or a different one). I don't really trust the spit test. If you have bad thrush I would say you have candida to some extent.
I would definitely recommend the Candida diet. Basically only organic meat and vegetables. It sucks but its worth it because of how good you feel during it. I have made an amazing recovery so far on only 3 or so weeks going full anti candida. Slowly but surely.
You could always start chelating by yourself. DMSA and APA can be bought online and they arn't too expensive.