You may just be having what they call a "herxheimer reaction" or herxing. Basically, the bad bacterium is killed off and as it dies it releases endotoxins, which are reabsorbed into the bloodstream, thus causing the patient to feel worse than before (happens a lot with doxy for lymes). It will go away. Start taking a probiotic, like Align or TruBiotic are really good. If you are constipated, drink prune juice daily or take miralax once per day. Avoid simple sugars and preservatives, no HFCS. Choose healthy whole foods, complex carbs, lean chicken or fish, and lots and lots of vegetables. No soda, mints, and limit caffeine.