Could it be possible thc to leave your system in 2 weeks?

Yes: A single dose of thc will cause psychoactive effects only for a few hours, and the metabolites can be found in urine (depending on what the detection level is set at) for 1-2 days, perhaps 3 days if the amount smoked was high. In regular smokers, however, thc accumulates in body fat, and metabolites can be found in urine or other body fluids for many weeks and sometimes months.

Depends: Light use could easily disappear within 2 weeks. Heavier or chronic use will lead to THC storage in your body fat that will gradually leave the body over time. It could take a month or more.