Samsun

What up everyone. I've read most of the posts on people's concerns and results relating to testing, but I thought I might share my info for some feedback. I am 27 years old, 6'1", 200lbs, 18% body fat, I work out about 3 times a week and walk everyday. I was a regular user from 97' to 02' then after that it was mostly casual, usually everytime I golfed, so about 3 to 4 times a month. I have a drug test tomorrow and the last time I "casually" smoked was on the 8th of October. Before that it was about two weeks. I drink about 96oz of water per day and have a pretty good diet. What is the possiblity of me failing a urine test. Note, I'll be using Detoxify's Exxtra Clean drink. I'll have abstained for 19 days. Thanks for the feedback, and sorry if this is a really common question. I just didn't find anyone within the same range as me or I wouldn't have posted.