One caution I've learned about the Bentonite is that since it is so spongelike, it can cause constipation because it is drawing out all sorts of stuff from your system. The solution is water, and lots of it, but spread out your drinking across the day.
You can stop the Bentonite but since Bentonite seeps out toxins and heavy metals, you may not have gotten its full benefit. Bentonite is not supposed to help you poo regularly (like I said it has the opposite effect) which is why it is good to take it after you have a program for getting the 'ol bowels moving regularly in place.