I was a heavy smoker quit little over a week ago after smoking for a week and was clean for 2 mos b4 that. i have 6 days to b clean for a work test. i am 6' 1" roughly 180 and smoked at least an 1/8 a day before that 2 month mark i have been taking 500 mg time released niacin everyday and green tea. after one week still failed home test. any help would b greatly appreciated as it means the livelyhood of my family and kids thx