3weeks Ago I Went To Werner For A Truck Job

3weeks ago I went to Werner for a truck job and took a drug test. 3 days later Dr. Lak lak told me that I had a detectable amount of THC in my urine. Iasked what the result was and she refused to give me the result saying "it doesn't matter' I requested a retest of course on the same specimen. went to another lab yet came back to her lab and again said the same thing. Shouldn't the second lab contacted me first?