It sounds like there's more to your story than you've told here.
I would do the Candida Plan first. You need to balance the overall bacterial flora and establish the correct immune system regulation. You can't correct a parasite problem while these other imbalances exist. Sometimes, just balancing these other aspects first will balance out any parasite problems.
The neurological issues could be brain inflammation from past antibiotic use and ongoing imbalances in the body.