If you really only smoked 3 hits (this depends on if you were clean before the 3 hits) you should be just fine. Try not to test first thing in the morning and do drink alot of tea, water, juice whatever you like and pee as many times as you can before you go. Being an everyday smoker I have still cleaned up in as little as 10 days for jobs. Good luck. You will be ok.:stoned: