I had to go see my P.O. today and I finished all the requirements.( Community Service, Fine, and Drug Classes). He gave me a urine test and I do believe that I will come up dirty. I am on probation for misdemeanor possession of marijuana. What can happen to me for coming up dirty? I was sentenced to 1 year jail time which was dropped and I was put on 1 year of probation. I am really scared that I might have to pull the 1 year in jail just for coming up dirty. Can anyone please respond ASAP. I need help.