Hi Karen,
You ARE doing really well. Why mess it up now? If you really have a craving to eat, then why not pick something really good e.g. if you like crunchy, crispy things, then how about carrot batons and some extra light garlic mayonnaise? Or if you have a sweet tooth, then go mad with a sugar free jelly or freeze grapes and suck them.
I was like you last week and I was given great advice just to plan for a bad day (but with good things pretending to be bad). It really worked for me.
Best of luck,
Determind