day 15 question

on day 15 and wanna keep going longer but I am going out of town next fri the 21st to las vegas, where i promised i eat, am celebrating my sis'bday etc... i am going to stop on the 19th probably and have some oj and then probably eat close to normal on the 21st.. and then brunch on the 22nd.. what can i do? i am sure i will be fine. i will have a semi glttonous weekend and then when i get back next week get hard core healthy again. should be fine right????