Got in a little bit of trouble with the law..?

Last night my friend was driving and we got pulled over by a cop. Unfortunately, he was intoxicated and he got charged with a DUI. He is 21. I on the other hand am only 19. I was in the passenger seat and the cop administered a breatherlizer test and failed. I got charged with ill possession of alcohol. I was wondering what I should do/expect in the future.