u would be considered a heavy smoker (like me)....you have been clean for a while which is very important...people dont get that part, but you can still pass if you are a heavy smoker and smoked recently before your test, i have done it. coffee will not increase your metabolism......you need to exercise(cardio) to the point where you are sweating....i wear a whole rocky outfit with winter hat and all so i sweat even more.....from your weight and height you are much bigger than me and i dont know your fat % or diet, but you should change your diet to a healthier one.....i heard berries are good for you and of course hydration (like an athlete, not just drinking a few cups of water).....i think you wll be fine....just dont do anything until after you pass