K well I was on probation for 6 months for breaking an entering and I know how you feel it fucking blowed so take my advice as I was in your place before. While on probation I only really had two drug tests, one prior to court, second 3/4 of the 6 months. I passed both, and I smoked like 15 times total out of the 6 months. Take some salvia or some shrooms if you get the chance, I hear that shrooms show up as food poison er some shit unless they give you a spinal tap which they wont for a drug test lol. I'm not sure niacin acctully works good, er if at all, but I did take some before my test an passed but Idk if I was clean er not. And umm... X, e, beans, rolls, well the MDMA itself should be out in like 3 days but the shit it's cut with ussaly will stay in so I would stay away from it, Btw for everyone whos keeps saying this, X is fucking harldy ever cut with heroine, it's way to expensive to use. Ussaly it's just meth, coke, DXM, But ussaly just meth. Alchahol is a fine alternative =D.