It can take as long as 6-18 months to fully recover from candida overgrowth. I agree with what able said about being symptom free when you start phase 2; if you start it too early, your body won’t be strong enough to fight off the candida that feeds on these foods.
I cheated for a week straight after 4 months when I went on a trip to LA. It set me back about a week in my recovery but I was able to get over any ill effects.
Alcohol is about the worst thing for the diet, so once you slip up and drink alcohol, expect to be set back to phase 1.