Failing pre-employment drug test; healthcare?

I'm 20 and I havnt smoked weed in about 2 years or more, but I did a litttttle bit about 3 weeks ago. I just applied for a c.n.a job and had to take a pre-employment drug test yesterday. If I fail will it just be between me and the potential employer or can it go on some kind of list since I'm in the... show more I'm 20 and I havnt smoked weed in about 2 years or more, but I did a litttttle bit about 3 weeks ago. I just applied for a c.n.a job and had to take a pre-employment drug test yesterday. If I fail will it just be between me and the potential employer or can it go on some kind of list since I'm in the healthcare career? I'm currently in college to become a registered nurse and don't want it to ruin my chances. Thanks.
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