Influence

Im on Level 3 Probation in Delaware. My PO said i have drug screens and drug tests... this friday i have to meet with my PO again. (2 weeks ago was the first visit with no tests) Probably to have a drug test/screen. Yesterday, Sunday, I smoked. Stupid. Sure. I'm really scared now. Horrible decision. My friend told me to take pills from GNC...he explained how he passed everytime...but should i trust him? Trust him with my life? Im 18, 5'5 only like 104.... Is there a chance i can pass? I read that vineger and water wont work. My mother says detox kits/pills wont work either and all shes saying is im going off to jail. She compares diet pills to detox kits because people will spend money for whatever they think works. Kinda like a hoax? Well I dont know what to do...If i get a VOP im off to jail. I really need some expert advice..because this is my last chance. Level 3 goes to level 5...jail