Does vinegar clean your system of THC?

I just want to know if it cleans your blood stream? oh also I have a drug tets thursday morning which is tomorrow its just a pee test this one and I smoked last week wednesday through but I only smoked all together under 2 grams if I stay up all night drinking water and pee like 10 time sbefore I go in could I pass or am I ******? I should also note I been taking 3-6 500mg niacin capsules a day since saturday night would that have helped?