230 LB.S and take a drug test this comin' up wed. should i p DRINKIN A GALLON OF WATER AND GREEN TEA?

Plz help i have been drink lots of water should i start drink 2 gallons of water . i'm still drinkin green tea and i have been taking mikl of magnessium witch is suppose to flush out fat in your body. very worried and it will be 44 days that i have not smoked on the day of the drug test. I tested myself at home and the box said 99.9% accrate and that i should take up to 2 hours to 40 days. i smoked a joint a day should i be clean by now or what very confused and scard. time is running out. never smoking again. thaks for tha help.