During my years battling and learning about chronic candidiasis, I have learned one thing, people who suffers recurrent yeast infection should chelate mercury if they suspect it may be a hidden underlying immune suppressor. If you have had amalgams, a high fish diet during the years, and other possible mercury sources in contact with you, go straight to chelation and skip any test. There is too much controversy about the way to test mercury toxicity to spend money testing it.
Chronic candida and contact with mercury in any form = chelation. This is your best bet.