Evenings are my tough time, too. I'm usually unwinding from a very stressful day (or week!) and I found myself eating mindlessly while doing it. (eating IS comforting!) I like Kae's stair analogy -- you just hit a rough patch, but you CAN get back on track. You can also think of it this way -- even if you DID binge enough calories to make up for the deficit you created last week, you're no worse off than you were. Weeks when I don't lose, I just say, "I was practicing maintenance!"
All that said, I found setting a time limit after which you will not eat anything was helpful to me to put a stop to my mindless eating. I've had the "no food after 9PM rule for 2 weeks now -- the first week, I held to the plan 5/7 days, last week was 7/7. I've kept the same goal this week to try to build it into a habit! You might think of other goals to set or strategies to combat the binge like setting a timer for 5-15 minutes when you feel like eating and then not eating until the timer goes off, or drinking water or other low-cal fluids instead.
You CAN do this. Today is a brand new day!