Well honsetly, they weren't even allowed to drug test you in the first place IMO because they didn't catch you with anything, therefore they don't have proper grounds to have sustpected you in the first place. If I were you I'd just walk out in the first place, but you didn't do that

Maybe they'll send you to rehab, who knows. Apparently that's what they do to kids who smoke herb. But you should tell them that you were never caught in posssion of drugs (especially in the school, which is why they really have no reason to kick you out), and that you know your rights, and as long as you weren't caught in the act they can't do anything. Just say you were at a party or something like the week before and you did speed and smoked weed.

By the way whay haven't you taken care of the two bnitches who told on you? If I were you their heads would be stuck up their asses right now.