I would try something else. If you don't get die off with Humaworm, plus lots of bugs in the potty within a week, well, you must be unusual indeed. I would not use that at the same time as the zapper though just in case you do start to have die off, to keep it from being too intense.
You can check to see if you have Tapeworms with the cayenne pepper challenge test, mentioned in the link below. If you see "white rice" or other parasites it may be that the product you are using, or maybe the dosage, is not for you.