DESPERATELY NEED INFO please respond

ok, so my moms a bitch and is gonna piss test me when i get home from prom this saturday. shes gonna get one of those cheap ass walmart or cvs things so im guessin i can fool it.

now heres the real dilemna. the only reason im goin to this fuckin prom in the first place is to please the girlfriend..........ssssoooo if i have to go sober im gonna shoot myself.

i need a way to pop an X and smoke like one blunt the day of prom, and then fool the test when i get home later that night. i got some azo's and a friend who has niacin, im hoping thats enough to fool a cheap test. or if ne one has an alternative method, that works to. if not, i need to know how to go about taking these things (how many, how often, milligrams, u get the idea)

dear god someone please throw some info at me.

many thanks