Drug test tomorrow

[whiteACID]

I'm not sure if this is the right forum to post this in. I took three hits off of a joint yesterday but before that I had not smoked for a month. And even then I just smoked casually. I got a call for a job interview that I will be having tomorrow and they told me they will be doing a drug screening. My friends told me to just drink a ton of water before I go in and said I shouldn't have a problem since I only took a few hits and before that it had been awhile since I smoked. But of course I'm still worried.

Another friend told me that because I'm thin and small that it would be easier for me to pass also. That also didn't placate me. I'm just wondering what your thoughts are on my chances of passing the urine test tomorrow and any advice would be great.