Taking any drugs three days prior to a UA when you're on probation is ignorant. If you play you sometimes have to pay. It's the user's fault no matter what the results come up as. Handcuffs may be serve to be a lifejacket in this situation. I personally have no mercy on that type of behavior. Sorry but you don't always get to behave like a child and get away with it.
I am not a dr. My statements are based on years of experience and related education. Consult with the professional of your choice regarding matters of concern.