Don't cheat with a carb, if you have to cheat do it with protein, like a shake or extra veggies. You have to understand Ketosis and then you will understand why. It is like falling into a frozen lake, being saved and warmed up and then jumping back into the frozen lake. You are resting your pancreas, don't wake it up, shock it and then shock it by going back to Phase I. If you need to phase off, do it! ( I don't recommend it, it sounds like you are almost there)