NIDA 5 Dip Card With Faint Line

Hi guys, I have a drug test for pre-employment purposes on Thursday. The last day I smoked was on 6/5 and the time before that was 2-3 weeks before that. I've been taking creatine to up my levels as well as niacin to speed up metabolism (around 400mg a day)

I took a urine test with a NIDA 5 Dip Card that I bought from meditests.com . I used my early morning urine (first piss of the day) , and came back with negative results, but the line was faint (pic below). Do I have anything to worry about? I'm going to test myself tomorrow using a lighter version of the water dilution method. Do you guys think I should still do water dilution or do you guys think I am good?

http://i52.tinypic.com/2pt8guh.jpg

Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting

Thanks for all the help.

Using first pee of day + a line that can be seen = u pass

Drink a cup or two of coffee and whiz a few times before testing and give midstream. No sense showing up to a gun fight without bullets. Enjoy your new job.

Passed! Thanks for all the useful information and advice.