Stopped Smoking For 44 Days, Had A Random Drug Test

Stopped smoking for 44 days, had a random drug test today but was scared that the thc wasn't out of my system because I had smoked for roughly 6 months and took a home drug test at the thirty day mark first thing in the morning but didn't pass. (I figured I wouldn't since first thing in the morning is the dirtiest time and 30 days wasn't enough) so I cheated and used clean piss. I figured since the professional at the drug place said that it takes 40 days for thc to leave the system, and I wasn't around it either, that it was fully out of my system. I smoked 4 small bowl packs today out of a pipe and I ended up hating it and was super paranoid the whole time about the next random. How long would it take to get it out of my system if I started drinking lots of water and eating healthier and becoming more active? I'm 19, 159, 5'4, female, and my metabolism is pretty good.