I have to pass a drug test in 7 hours, I'm almost testing negative already from tons of water and exercise but it's still a clear positive for marijuana. I need help or I go to jail.
Buy a detox drink, I got one at my local smoke shop and it worked for my job. I just didn't smoke for about 4 days and then took the drink and passed the test. Most of this stuff depends on your body though, I've gone 10 days drinking water only and was able to pass a test for probation. I'm pretty skinny though, so it could be different for you. I can't guarantee anything, but that's what worked for me. I know that personal drug tests for some reason are harder to pass than the real thing. I would say you're in the clear if you haven't smoked for a little over 2 weeks, drinking plenty of water and peeing a lot.
Best of luck, worrying too much won't help you. It's scary as hell, that's why if you pass you should just quit smoking for the time being. Nothing is worth losing your freedom over.