Lab Test for Probation

[Kid Disco]

Ugh, so since yesterday evening I've been stressing about last weeks drug test.
Friday night SWIM went to a rave and took two 30mg XR adderall. After the rave SWIM took 2 hits of speed (there was no more than a quarter gram being smoked between 4 people). Beginning Sunday afternoon SWIM gave a shoddy attempt at flushing his system (excercise/tons of water/antioxidants/multivitamins). Thursday morning SWIM went in for a drug test and despite the fact he had dranken a moderate amount of water he was unable to urinate and when it came time to it still came up yellow. Since it was in the morning he would have to guess that the yellow insinuates the urine may have been somewhat dirty.
Do you think between the somewhat low dosage of amphetamine and even lower dosage of methamphetamine that SWIM has a chance in hell of having passed that lab test?