Thoughts On My Upcoming Drug Test

I know this forum probably gets a million posts like these, but I need the peace of mind from people who have done this before....

I smoked about 1/8 weed for the last two weekends, and prior to that smoked periodically (maybe 1-2 times/week at the most). I'm 19yrs old, male, 5'11/165lbs in good shape with a fast metabolism. I just got an incredible job offer, and prior to starting next week I have to take a drug test tomorrow, which means it will only have been 6 days since I last smoked. All week I haven't really done much of anything except play video games passing the time by waiting for this job, and I also haven't really eaten much (about 1500-2000 calories/day).

When I found out I had to take the test, I immediately began following the dilution guidelines from the stickey post. I took two seperate at-home drug tests (PharmTech and First Check) and each one gave me a negative result with a faded test line.

I'm just really concerned that since I'll be taking my test at LabCorp on-site that I may not pass the test, since I don't know if they do the 50ng/mL immunoassey/dipstick cut off or 15ng/mL gc/ms cut off; and since my test line was faded on the at-home test, I'm not sure if that means I'll fail the 15mg/mL cut off. Also, with only 6 days from last smoking, I'm a little on edge...although in the past I had to take a drug test for court that I was expected to fail since it was only 4 days since I had last smoked weed, but I passed.

Dunno...I'll let everyone know the result though when I find out tomorrow I expect...some feedback before then would be awesome though~