at Home Testing question

This is a question directed mainly to FakeBoobsRule and to anyone with experience.

I have a pre-employment drug screen for a new job on Feb. 11. At the point I take the test it will have been 18 days since having smoked. Here are my stats:
Age: 27
Weight: 190 (very little body fat)
Height: 6'3"
Activity level: minimum (I sit at a desk all day)...but I drink a lot of caffeine, and have a pretty high metabolism (I think).
Smoking history: took a break from Dec. 25 - ~ Jan. 7, then smoked 1 - 2 bowls per day up until Jan. 24.
Extra info: I keep myself overhydrated all the time. Due to a medical condition, I also eat well over the amount of soluble fiber required by a normal person. I also don't eat foods that are high in fat.

SO! Today will have been about 5-6 days of no smoking. I bought the "at home Drug Test" at WalGreens which, according to their website, tests for more metabolites than a typical lab will. They also include a table indicating the 50 ng/mL cutoff point, which I have seen repeatedly mentioned on these, and other forums. I did the test this evening and, along with the control line, there was a very distinct and visible second line, which, as you all know, indicates a negative (passed) test. I'm naturally a paranoid person, and I have been FREAKING out, even after I got this result.

I want to know the general opinion of the forum community if I will pass a urine test in 2 weeks.

Thank you all!