Replying to Drug test question/advice

So I just pretty much got a job at Wal-Mart. Thing is I have to take a drug test. This wouldn't normally be a problem except for the fact that I tried MJ for the first time with my roomates on Sunday. I only took 3 or 4 hits and I barely even felt anything. So now I'm paranoid...I hear it stays in your system for up to a month, but I've also heard stories where people have smoked the day before and they came out clean.

So Newschoolers, I need your opinions and advice. I have no idea what's going to happen, but my drug test is tomorrow at 10:30. I heard somewhere that if you drink a shitload of water it helps, so I'm considering doing that.

Shit. Drugs suck...I didn't even feel high, I don't think. Or else it was a really really small one.