What you're describing is the story of every person who's ever attended an OA meeting. Emotions->sugar binge->guilt & discomfort.

Try a few OA meetings. Even if you don't want to do the program whole hog, they will help you get that behavior under control for a few weeks.

Really, I don't know how it works, but it DOES. If you go to a meeting and you sit in a room with a bunch of people who keep telling versions of your story, "Just one bite and I'm totally out of control," it makes it possible to stop.

I have no idea why this is. But it works.

Anyway, even if you didn't want to become a full-fledged member of OA< it would help you to cut carbs out completely for a sufficiently long time that you would be released from the craving.

Good luck.