You had a binge. You made a food choice you're not happy with. You've identified how you felt before eating. Now ask yourself, "What's missing?"
Good news! The blues are temporary and you can use stress busters - exercise, positive affirmations, connecting on Spark, enough sleep - to combat them.
Plateaus can feel like getting "stuck" but it may be your body is just resetting itself. Keep doing what you know you need to do and be patient. In time, you will move forward again, better than ever!