From my own grueseome experiences with a systemic infection of candida I learned over a period of several years years that it caused a multitude of symtoms which worsened over time. I experienced the continuous white tongue, smell sensitivity; couldn't bear to be around people with cologne and car fumes affected me terribly, ringworm infection, toenail fungus, brain fog, and had blurry vision (last symptom, and most scary).
I have cycled many different types of anti fungals and what I've learned is that the die off is going to be horrible and MUST be endured several times to get the infection under control. One cycle of anti fungals and diet will only reduce the infection somewhat, ready to bounce back again to where it was - taking over your body and mind.