If you really want help, first don't try all of that "drug test guarentee but no money back because we are lying bastards" shit. First, if you know you'll be able to, get your friend's piss and use it. If you can't though, you want to stop smokin' now. If you're smoking as you read this, put it out and put what your smoking with the rest of your weed. Next, you want to drink a LOT of water between now and the first. Not enough to cause water intoxication, but stick to about 5 liters a day, no more and no less. Also, make about a liter or 2 of that right before you go to sleep. Also coffee helps a lot. It makes you piss more. Next you want to excercise a lot. That was you will burn off some of your fat, which contain THC metabolites, as well as you will lose some through prespiration. Now, you should pass your test.