About possible candida issues. Maybe but I really think candida had become the diagnosis du jour with a lot of holistic practitioners. I'm not saying that candida overgrowth doesn't exist but it is really rather rare and caused by something pretty severe like a prolonged bout of industrial strength antibiotics.
Have you seen an allergist? You may be having a histamine reaction to something. Could be a food intolerance, a soap product, pets, any number of things.