I just took pre job hair test and the used Psychemedics. They're testing for 4 drugs. ?

Im an infrequent user. Not even infrequent. In the last 6 months Ive taken maybe 6 PUFFS max. The last puff 3 weeks ago. Im not even sure if I inhaled correctly. Been doing research and some sites say that wasnt enough to p through bloodstream into follicles. Anyone infrequent ever ped?