two weeks? and you're sure it's a piss test and not a hair test or something?
beetle, i'll be real with you, imo this is doable but you gotta want it. exercise every day, run, get active, lift heavy shit, go biking, move your body and sweat sweat sweat. drink water, a lot of water but not too much, get that shit diluted af in your system, and piss it the fuck out. the clearer the urine the better.