Hi
I think that it is highly unlikely that you don not have any more stones to come out and think that a parasite cleanse is a must. It is a bit of a pet subject of mine actually, having discovered what nasties I had lurking. Ridding myself of these things resolved several allergies and was very well worthwhile.
I took Wormwood , Black-Walnut hull and cloves for several weeks, but the thing that reallly made the difference (and so quickly) was the zapper I bought. (Details on Dr Clarks website) A week of zapping daily before your next flush should make a big difference. The herbs do work well too but are slower (about 90 days) doing both makes sure you get them all. Don't forget the maintainance program though, as you don't want to get re-infected.