We are following Andy's protocol for chelation and had to first treat all of that as well. It is worth it, but it may not take you 6 months. You will continue with yeast treatment the entire time you chelate anyway. You will need digestive enzymes too. So it is fine to start all that, one at at time and continue it while chelating. As the yeast and other problems will just return with chelation. I have read many chelation protocols and we are using his for both my children and soon myself, as it make sense, and scientifically adds up.