Pass drug test this week; details within

Stats (if necessary) - 31 y.o., 6'0", 185lbs, decent metabolism as I don't exercise but I'm still considered skinny -- I rarely ever smoke. I smoked twice this year total and that was a few months ago. However, I made a batch of weed brownies last week that had only 3 grams in it (grinded it, cooked it into the oil then placed it into the brownie mix). I ate about 3/4 of the pan. I just got a new job and expect to take a drug test the hiring manager referenced this week. Possibly even tomorrow!

I am under the impression that if I just dilute my urine by drinking a lot of water and taking b12 and creatine that I'll be fine. I want to get a consensus as to whether or not that's true. I looked up "detox" products and I'm not convinced they'd do more than what I already listed (water/b12/creatine). Should I be drinking copious amounts of water now, or do I wait until a few hours before the test?


If anyone has any insight or feedback, I'd greatly appreciate it!