New to the board and want to thank you all for writing and sharing your lives with us. I have had cfs for 12 yrs and finally hit bottom. My partner found Dr. Crooks book Tired So Tired and it really hit home. My doctor put me on ketoconazole to kill the yeasties but the die off is killing me. It's been 8 days now and I feel worse then ever. How long can the die off last?