this is not strange. the more you flush, the healther the body will become. but to get to the stage of being healthy, it will have to expell certain things. a temporary increase in symptons might be a reason for you to stop doing flushes in the future, but in practice, from what i have read, continueing flushes will be your remedy in the end
now i have never practiced flushing myself yet, but i have read alot about the subject and health in general. im quite sure this is the case. candida sounds all nice and dandy, but it just shows your body has too much waste material which is causing you these problems. i bet naturopath's will give you all kinds of great theoretical blabla just to make sure you will keep coming back