Drug test coming. Need advice fast!?

I smoke on a daily basis but have cut back for the last 2 months. I have not smoked for almost 2 weeks now but when i tested myself it came up positive. I understand that THC is fat-soluble and can stay in your system for a while. I have an official one coming up in 2 weeks time that I really need to p. Can anyone please tell me how to get rid of the THC in my system quickly or share their experiences on how they got around this? Do those home detox kits actually work? Substitution is not possible due to the nature of the test. Greatly appreciate any help!