You smoke multiple times daily so it may be in your system for a while(3-5weeks). There are many kinds of detox. Some are like a 7 day process and some are just a mask. If it has all the guarantees on it, it's probably a mask which only work 50% of the time in daily smokers. Your best bet is to get someone whos clean and get some urine and put it in either a condom or a small travel size shampoo bottle and put it in you underwear and keep it 90* to 100* just pour it in instead of peeing yourself. It's best to practice if you are nervous. If you are supervised while you are peeing you'll just have to wing it so make sure you dulute your piss with ALOT of fluids and don't smoke anymore until then.