it sounds like youve had about 3 weeks between smoking and the test. if you only smoked that one little bit two weeks ago, having been clean before that, you should be ok. then again, it all depends on your metabolism.

the more active you are, the faster you clean-out. oh, and if you drink too much water before a piss test, the results might be diluted & you would then have to take it again. a friend of mine once lost a job offer because his results were diluted on a test and the consecutive make-up. thus, being too careful can be as bad as not being careful enough.