I am freaking out

I just got an offer for my dream job, but it requires a drug screen. I have never had drugs in my life, but on st patricks day, I smoked an entire marijuana with a friend. By my calculations this was 44 days ago, most websites say that this should be sufficient time to be undetectable, but does this take into account that I smoked an entire one?

What should I do man, I'm freaking out. Is this what I deserve for being reckless and crazy?

>>8
I'm not really sure. I puffed it like 5 or 6 times out of a tin foil pipe.