People can get these things James from problems such as anxiety ect, but did you have an onset of your illness were you well before. Do you have a lot of fillings. If I were you and you have doubts yourself, look up the symptoms of Mercury poisoning and Candida on the internet and see if you can relate to them. But you know yourself best and dont doubt yourself if you beleve your symptoms, as many will doubt you along the way and you cant rely on doctors tests, theryre simply not reliable enough to tell you much, unfortunately you have to do the research yourself and see what you come up with. Best wishes Tracy