just don't drink too much at once! i've got a test coming up in 24hrs and when i found out only 48hrs in advance, i freaked out and drank a whole bunch in a few hours of span...let's just say i've had a nasty headache all day yesterday and found out i could've killed myself...lol

and if you have time to order a home test kit online, do so immediately! if not, go to a local drugstore such as walgreens, cvs like i did and pay heck of a lot more...but you'll have an idea of whether you'll pass or fail.