Would like some suggestions

I've read a lot about zappers and would like some suggestions... I have been using this one: http://www.frequencygeneration.com/zapper-tests.html

on and off for about 5 months. If I wanted to target specific critters, I have candida, strongyloides and maybe more. I have posted messages stating I have a 5 year headache. I would say from what I've read it's more of a encephalitis (or meningitis like symptoms.) I discovered this site around 6 months ago. Mainly reading on parasite support page. I do not know if I should seek the pharmas for strongyloides I would like to go with out them, but they may help? I figure they (strongyloides)MUST be in my head? DON'T KNOW!
barley malt and mannitol are helping I think? Tried all kinds of herbs in the last 5 -6 months and last week stopped to see what a break would feel like. I think I may go back on the herbs, It might be that little bit of psycho-semantic activity kicking in now! with all I have seen here and learned. How does the frequencygeneration zapper compare, or should I spring for one with more frequencies? INFO OVERLOAD
Thanks!