The first thing that comes to mind is, what are you doing to support your body as it's trying to eliminate the toxins/ parasites that are being killed off (besides regular elimination). Are you drinking lots of water, taking Epsom Salt baths or infrared saunas, using Bentonite clay, or anything similar. Additionally, have you got enough supplementation to help your body heal?
Just wanted to make sure you had these bases covered, in hopes it might help you. It must be a big stress to lose time off work, in addition to not feeling well. Make sure you support your body, in addition to killing the bad stuff :)