there r other things that can produce a false THC positive - surprisingly enough, apparently one of these is ibuprofen
THC will show up for 6 weeks....im trying to think how many days that is - 48 days?
sounds like ud hav to hav a pretty fucking slow metabolism for it to show up as genuine THC
all i can say is look it up on google, see wat the other substances r that can produce false positives for THC (i only know of ibuprofen but i am pretty sure theres others), print it out and present it to ur PO (if thats why ur being tested)