It sounds like there are a lot of toxins that was being released via the p&b shakes. I was initially constipated and bloated with the shakes.
Instead of bentonite, I use one tbsp of the following: olive oil, acv and psyllium seeds and husks.
Try using some slippery elm. Also, various spices such as tumeric will help reduce gas/bloating.
It is worth trying to use a variation of a psyllium shake because, as Jhan already stated, psyllium will drag out the candida. Other types of fiber are great for the body, but psyllium will drag out candida and mucoid plaque over time.
Alex : ))