Out of curiuosity have you tried using Pau D'arco tea consistently? It can be quite good especially when mixed with Red Clover tea and used as a detox tea for the blood, liver and candida. Its very mild in comparison to other treatments but I find it to be very effective as well if it can be maintained. I suffer quite badly from allergies as well and have found the blend to help quite a bit.
Besides this have you tried a charcoal blend mixed in with fiber for cleansing out your bowels? I would suggest visiting the Natural Healing forum perhaps and reading up on the formula known as Intestinal Flush #1 or IF #1... or it could be #2. In either case the blend contains your fibers in addition to charcoal and clay, so for those suffering from candida it can be quite helpful. I think if you were to take the fiber shake at a time away from meals by at least 3-4 hours you wouldn't have issues with mal-absorption caused by the clay taking everything into it.
In the worst case what about juice fasting combined with some fiber initially to clear out the rest of the bowels?