Pick up some cheap test strips and test yourself. Follow the dillution sticky the morning of the test. Eat high fiber foods or take some metamucil.
Everyone processes thc differently so what works for one person may not work for you.
I'm 6'1" 280 lbs I can take a few hits 3 nights in a row and usually by the 3rd or 4th day after my last smoke I'm clean enough tom past a UA.SO test yourself to see how long it takes you to get clean.