I was in the same boat! Im 6'1 and 217lbs.. I quit smoking only like 25 days ago and i thought that that may be enough time but of course it wasnt... I just but Quick Fix Synthetic Urine and used it so im waiting to see if it actually did the trick(everyone ive talked to said it works fine and ive read countless customer reviews talking success). But 9 weeks and still dirty!? I would say just jog/excersize as much as you can, drink water(not tons), buy a home test a few days before the date and see what it says.. If your positive still, get a substitute(synthetic, or friend whos clean) but you should probably be fine with that much time!