Hello. I Took Two To Three Puffs Of Mj 3

Hello. I took two to three puffs of mj 3 weeks ago and just had a hair follicle test for a new job. Not very smart at all. Prior to that I have smoked once it twice in 2013, before that 1999. What are the chances of me passing? I really want this job and make a big mistake. I am a black female about 155lb/5"4...if that matters