It's ok. Just get straight back on it. Have your shake and water and just put it down to experience.
It's a hard habit to break, but if it happens again that you want to eat when you are stressed, try this....
If you want to eat something not on the diet plan, pause. Tell yourself, not now.
It's easier to say, in 5 minutes....then in 5 minutes, just decide to wait another 5 minutes. Make a choice, and pretty soon you'll have calmed down enough to take control and make a reasonable decision. 5 minutes isn't long, and it's better than telling yourself no, or trying to make yourself wait a longer period of time. You can cope for 5 minutes.
Do you see what I mean. You can do it!
I can't take the credit for the pause idea, I read it here on Minimins. I use it even now. If I think I'm hungry, when I know I can't be, I make myself wait and see. I have a drink of water to see if that helps. Half the time I forget I wanted something to eat, and suddenly it's meal time.
It works just as well when OH annoys me and I want wine or chocolate though!
So all I'm really trying to say, is don't worry, just start again, and if you find yourself in that position again, try the techniques people suggest on here, they do work. xx
I'll hope it's not affected you too much, you might be surprised if you get straight back too it.