ItsTheWoo, I find it's often helpful to put a positive spin on these occurances. Learning from mistakes can mean the difference between making it on this WOL and not. You had the sugary/carby meal and you did not enjoy the experience - next time this is presented to you, you'll know what to expect, right?

Don't beat yourself up about it in retrospect, it serves no purpose. Just keep the experience in mind and keep your water intake up and you'll be right back on track.

Cheers,
-Nat