Cannibis is a squirrley drug when it comes to knowing exactly how long it will stay in the system.

The GOOD News - most of the drug store drug tests are ZERO-TOLERANCE, meaning any nanogram registers.

MOST U/A PreEmployment drug screens give you a 49 nanogram cut off level - Federal guidelines, to take care of exactly what the problem is you say you bumped into.

The strange thing here is this - you should have had it all out of your system by the time you went into the smoke shop, 55 days should be plenty for a 'weekend warrior' smoker, anyone who isn't a regular. AND THC CANNOT show up in your urine for about 24 hours....

Careful drinking too many fluids BEFORE the drug screen on the day of, if you have over 40 OZ. within the hour before you drug screen it will show too dilute and you will have to re-test, often times on pre- emplyment they won't even re- test these....