You should be fine so long as you werent a heavy smoker before you stopped 3 weeks ago. I am a daily smoker and it took me 6 weeks to get clean when I had to test last year. A few years ago I used to get tested 2x per month for 3 months for rehab. I stopped for one month before I started rehab...
I have seen a few other people on various sites including this one talking about quick fix batch numbers and some of the batches being bad. I just purchased 2 boxes of Formula 5.7 at the local head shop for my boyfriend and I who both have pre-employment drug screens this week for different...