Well I was an occasional smoker on and off smoking about .5-.8 grams a week about 2-4 smoking days per week, and failed a drug test at 2 weeks. Based on that, I would assume you might not pass. You can go to a store like Walmart, Walgreens, RiteAid, grocery store, etc and pick up a drug test and test using your first void of the day. If you pass that, you could be good. If not, you probably know you didn't at that point.

When in doubt, sub out