The way one's body reacts to consumption of carbs is individualistic. Just because someone else gets by having a high carb meal or snack doesn't mean you can. It is especially important to stick to the plan during induction so that your body doesn't get too confused about what is going on. If you're back on plan, you will recover soon. Chalk it up to experience and be extra cautious next time. Also, it might help to have some non-food rewards to treat yourself to after a successful week.