Don't give up. Take some time to prep some fresh vegetables so making salads can be quick and easy. Make sure you have the foods you need in the house and pack your lunch for work so you won't be as tempted to turn to fast food.
I'm at a low-point, too, but I'm trying very hard to focus on my goals and not give in to emotional eating. I'm not sure if the WW application provides online journaling but you can start a blog here on 3FC where you can "talk" out your feelings and cravings and focus on the goals that motivate you most.