Passing my Rehab Drug Test?

Yess i know drugs are bad, and i have had a slight problem in my years and finally going to get help for myself. Now i did a phone interview and the lady had told me i must be clean for 72 hours prior to coming in. She had asked when the last time i smoked weed was and i said 14 months ago which is true. Well the past couple of days ive been really stressed and smoked about 2-3 grams of weed but i havent had any THC in my system for 14 months. Now i am moderately active and been a weightlifter for a year now, im around 14% bodyfat. I have exactly 4 FULL days to make this not show in my urine. So i was wondering if drinking lots of water, doing early morning cardio on empty stomach to burn fat, resistance weight training, and drinking green tea mixed with lots of water will get it out by then? if anyone has any tips i would appreciate it.