Great! I'm glad you tried the clay. If you want something stronger than the yerba prima, get regular powdered Bentonite clay and dilute it yourself so that it's thicker than the Yerba. I use the Azteca brand for that (also usually available at healthfood stores). That stuff REALLY draws it out.
Don't worry too much about mineral depletion, etc. Its a temporary setback, and what's ABSOLUTELY CRITICAL is getting rid of the infection. I would also take Antibiotics if you can so you're attacking it on as many fronts as possible. I'm against Antibiotics usually, but again, use all available tools to kill a mouth infection. It can cause big problems with adjacent teeth, jawbone, and even your heart and cardiovascular system if you don't knock it out.