G Rec,
You can do this – I have read so much of your entries – you have the mindset, and you have your methods down pat for what you need to do.
I have lapsed a couple of times since last year (am at day 20 right now), and I know one thing is for certain: You can only control one day at a time. Make a promise to be better than you were yesterday.
Let this lapse be a minor one, learn from it, and lets move on. Together!