if i was u i would dilute...there is really no way to be clean in that short of time.. and it wont matter if u start drinkin water now..u have to wait till the day of the test..and drink TONS of water about 2 hours before the test...make sure u piss like 5 times before u go to the lab...then make sure not to smoke and when they call u to tell u its diluted hopefully your pee will be clean by the new UA date..

good luck man..