Don't know why any of these things would induce vomiting. I do believe some people have problems with Bentonite and psyllium but you said you have used them before without a problem. You are definitely on the right track with trying to repair the endocrine system. Just be wary of practitioners that oversimplify things. Gerson and Clark has some great ideas, but there is much more to repairing and healing the body to their very oversimplified methods of detoxification. From their teachings, it really seems that they had very little understanding of the importance of the endocrine system and the nervous system and how to repair these systems. If your endocrine system is out of balance, yes you will likely have parasite infestation. If I were you, I would do plenty of research regarding supplementing with iodine, many people including myself, have had complications from this.