What was the behavior that your mom didn't like that got you busted? Maybe you should try talking to her and figuring out what she wants improved so she'll lighten up. For instance, say she is paying for your college tuition and you are sitting in the dorm getting stoned everyday and getting straight F's for your Mom's hard earned money. Fix the grades, she gets off your back. It may not be that simple, but communication is the key. That and synthetic urine. But seriously, if you don't fix the behavior, the testing will go on forever because your mom won't believe you anyway.
Not to sound arrogant, but I make straight As (with the occasional B) in honors classes at a private academy in one of the richest counties in America. I have a very steady girlfriend of over two years. I haven't really ever done anything wrong.. at ALL!! I've never even had a sip of alcohol. The only lies i've ever even told to my parents involved marijuana and that was out of necessity for obvious reasons. My behavior is that of an intelligent, responsible, loving, caring, giving child with a bright future.. who happens to smoke marijuana.. She is a strong believer in the gateway theory and believes quite firmly that is is morally unjust AND against the bible. I tell the truth when I say my only vice is that I smoke marijuana. I use marijuana for the wonderful, positive, and medical affects of it. I'm not trying to escape reality or hide my problems, if anything marijuana helps confront my problems. After many, many conversations, medical journals, facts, articles, and hours and hours of research, she refuses to believe anything because she thinks it's all from "stoners with agendas just trying to ease their guilt so they can have their precious marijuana", and even IF she believed me, she would still fall back on the gateway THEORY and her religious beliefs, which in the words of George Carlin is just about as logical as saying, "nuh uh". Therefore, my only option is hiding it from her completely until i'm an adult or maybe even out of college.
