In all likelyhood your yeast problem is your mercury problem. Heres the deal. You get yeast or candida when your ratio of good bacteria to yeast drops down. The good bacteria keeps all other bacteria and yeast in check. Antibiotics obviously kill all bacteria but no yeast so unless you replenish you can get a overgrown ratio ie candida. Mercury is a antibiotic. It has been used as medicines in the past to kill bacteria and with your fillings your getting a 24/7 antibiotic dose. What you need to do now is rid your body of the mercury you have a take a probiotic (good bacteria) and you should have less of a uphill fight.