dude, it's not going to be anywhere near as bad as your mind is conjouring up right now... i imagine probation at the worst...

but as far as your parents go what do you really want me to tell you? you just kept screwing up... it's your fault alone, i don't mean to come off as an ass, but there's not really much anyone CAN tell you.... you did the crime do your time (as in with your parents) i say you quit til your 18... period, stop doing any drug, including alcohol and stay clean, maybe you can earn some trust and respect with your parents, back.... offer to even let them drug test you, just so you "can prove to them that you are clean" or you can keep up with doing drugs, getting caught and basicly continously dissapointing your parents...

do you get good ass grades? like A's, B's at the lowest? is your job steady? do you miss days of school for reasons other then actually being just to sick to go? (nasuea isn't a reason to stay out of school, having the flu and a 103 degree tempature coupled with full body aches, and constant vomiting, is) if the answers are yes, yes and no, then atleast you have that on your side, you can use that to show your parents that you were still performing "right" but now you want to quit because you're tired of disappointing them and you don't like feeling that way.