Following a meal plan

Today as with every day or almost daily this week, I have overeaten.  I have eaten more than the 2200 calorie limit.  I realize that there were foods that needed to be replaced with healthier options.  Hindsight, however, is 20/20.  It is a fact.  I need to take my health and my food intake more seriously.  I have not done a great job following a meal plan.  I truly don't know what to do.  Following a meal plan is much more difficult than I thought.