If you’ve been following the diet then the yeast infection must be die off, and there for, a good thing (in a twisted way). I haven’t had yeast infections for years and they started up again with the diet and anti-fungals.
As far as I know there’s no way of telling when they will go away.
Fatigue is very normal, you should rest and sleep to help your body cleanse and heal. It’s possible that your infestation is worse then your friends or even possible that you’ve been following the diet more closely. I view the fatigue as a good thing too.