The yanking and pulling sensation is from the chelation. Dizziness and nausea can be from mercury. They can also be from dehydration. Remember that your blood mercury level rises while chelating. I guess your blood already had plenty of mercury now, and the DMSA pushed it up too high? parasite cleanses also kill plenty of candida. It depends what is used and how toxic you are. The reaction during cleanses varies greatly. The most important thing is not to let yourself get constipated while doing a parasite cleanse or while doing chelation. One needs to be able to eliminate parasites, toxins, and mercury rapidly enough.