Get checked for environmental toxins. If zapping didn't help. it wasn't parasites! Zapping can't 'kill' toxins, eh?
And did you ever do anything to kill the parasite's infections That's what made it worse--Read Dr. Clark's book--she explains all this very specifically. The infectios are the part that hurts, and they live on without the parasite just fine.
Sheesh---think outside this faked box of what's wrong.