Just need some help with a drug test coming up

[breadall]

Alright, I'm going into Best Buy for an interview and I don't know if I'll get the job, if I do though I'm pretty sure they drug test. I'm 6' 2" and 250lbs. I've smoked three times in the past month and the last time I toked up was 18 days ago. I really want this job and as soon as I started looking I stopped smoking. Do you guys think I would be fine, or do you think I should go to walmart and grab a drug test just to be sure? Before these three times I was clean for 5 months.

 

[Weed420]

You should be ok with some dilution the morning of the test.
Drink 36 ounces of gatorade the morning of the test
Pee 3 or 4 times before the test
When taking the test
Pee a little in the toilet first
Pee 2 ounces in the collection cup
Pee the rest in the toilet.