If you're going to do a colon cleansing, I would make sure you are using a good probiotic as well. My reasoning is that you will get rid of a lot of stuff from your intestines and free up a lot of space. It would be better to fill that space with good bacteria rather than yeast.
I don't know much about your situation, but FWIW I've had a lot of improvement after chelating for a while. I've also had success with anti-yeast enemas, but that's ongoing, so I'm not sure what the final results will be.