I Suppose, I Recently Hurt Myself At Work, A Friend

I suppose, I recently hurt myself at work, a friend gave me a 5mg valium. I am still St home and its been 15 days since. I work T Walmart and I know I will be tested when I get back. They do a urine test. Do you think I will pass? If not I'd there anything I can do to test clean. Oh and I Also take oxycodone but it is a RX.