I just ';failed'; a drug test due to my urine temp being off, is there anything I can do about it? I am clean.

I am a new nursing grad and I just took a drug test for my new job. They said my urine was not the correct temp and dumped it out. It was grounds for immediate termination. Is there anything I can do to fight it. I went and paid $60 to have my own 8 panel drug screen done, so I can prove I am clean. I would appreciate any ideas, or advice. Thanks.