stop exercising like a day or two before your test. Fat is constantly secreting THC into your bloodstream which then deposits into your urine. You really only need to drink alot of water the day of your test. Make sure you take a triple dose of vitamin b-12(this only has to be done the day of the test)(for color) and increase your creatine intake, eitherwith a powdered supplement or eat more red meat or fish (you know things high in protein). If you dilute your uirne about 2-4 hour before your test and do these other things you should pass especially because your are not a heavy smoker. GOOD LUCK!