I'm 15 years old and have had a similar prob , ive been smokein for almost 2 years now and dont plan on stopin anytime soon. it all started about a year ago , i got busted at school with a dime , got sent to alternative school for 5 weeks , got drug tested (which came out marijuana positive). then at about the 3rd week of me being in the alt school my mom checks me into a counseling center , not only to see if i have any anxiety problems ( which i dont) but also so she can give me a drug test every month ( which the counseling center payed for).so right away i get a drug test ( came out super positive for marijuana) , find out i dont have any anxiety probs etc.., but am still scheduled for another drug test soon, at this time im finally getting out of alt school and convince my mom to cancel all of the counseling stuff as long as i pass the next drug test.After working out and sweating my ass off it comes to the day fo the test, i drink a large bottle of water and head to the counseling center, i pass my drug test and am finally out of a big mess. Now all i have to do is play it low for a while to regain my parents trust. Been about 2 months ive been playin it low and just got a 25 sack and begin to smoke without any suspicion. I would suggest playin it low for a while then gradually starting back again. the way i passed my drug test was to just sweat your ass off, which means exercise alot , go running etc(jsut sweat sweat sweat, this loosens your fatty pores and lets the thc toxins out through your sweat), also drink alot of water and cranberry juice on the you have your drug test, before your drug test, this will make your piss diluted and also make it not look so diluted. i am homeschool now and smoke while my parents are at work and brother is at school ( my brother is a pussy and will tell on me for smokeing to ). and remember , your parents arent gods, they are people like us teens , dont be afraid of them. Peace .