Well, if taking a break from herbs causes problem, why not continue on indefinitely with them. It can take 3-6 months to really kill the bugs off. Even then you will never know if you got every last egg or bug, which probably you did not. That is why maintainence is important, mho daily.
With the hair loss I am wondering about undetected thyroid problems. The link below has info on that topic as well as on parasites.