21 days ago smoked 2 bowls and half of a joint 2 days prior to that. 6 foot 5 inches 180 pounds (quite a high metabolism) RARELY smoked before that not even monthly. Also a heavy, almost daily, drinker (not sure if that matters) I have a pre-employment urine test in 3 days. Bought 2 different brands of home tests, one from a local smoke shop, and this one: Quickscreen At Home Drug Test 6 Walgreens Both came back negative! Am I likely to pass the immunoassay and not the GC/MS?