Sabbotaging myself

I told myself I'd try to loose the 5 pounds that I gained (again) before my bike race. (I want to go into thisyears race lighter then last year!) So far, I've been very BAD on my diet. I ordered pizza on Sunday and I've been way over-eating (fruit and cookies). :(
My race is on the 19th... today is the 2nd. I have 17 days to get back in the groove. Normally I could do it, but this weekend my best friend Raeleen wants me to come visit her for her birthday in CL. I don't think I can watch my diet while I'm there! Booo!

So I get home and basically have a little less then 2 weeks to get 5 pounds lost.... anyone know a good cleanse I should try?