Also, you can further the breakdown of specifically what chemical showed up as meth since many prescription drugs can show a positive for meth on a drug screen
. No worries about your weed being laced. No one would ever spend that kind of money for no pay back ;) and as far as someone cooking it, you would have to be in pretty close proximity for an extended period of time in order to come up hot. Chances are you took a prescribed drug that you didn't realize would test you positive.