i have a similar type of thing going on. i just moved to tx and got transferred on probation so i had like a 2-3 week window before my po contacted me. needless to say i got fucked up. i had about a week to get clean. i smoked 3 blunts by myself over this period. It was pretty crazy for me. I got my ppl to ride me to the mall(i had no cash) and stole some niacin. then i drank water like crazy(juices too) and kept poppin niacin. idk how much i took but everytime the burning stopped i popped like 2-3 more pills(500 mg) i was clean in 4-5 days. took a cab to the drug testing area in my city and came up clean. the tester had 5 lines the one for thc was filled in like the others (amph etc.) but barely. i think that meant there could still be traces in my urine but its still considered negative. the sticky explains how that would pass bcuz po's or whoever doesnt actually send the piss to labs they send it to be tested then if positive they send to labs where they could possibly find traces. hope this helped my piss test was 2 days later i passed.
a soon as you talk to the po he can tell you to come in the next day, so delay as much as possible. when do you call him if you have a choice call late on friday so you have the wknd. pee as much as possible and take niacin it worked for me especially the day of the test do not give them your first piss of they day when you wake up.