Employer lied and said I failed a drug test. I can prove I didn't. Can I sue for wrongful termination?

I had an accident at work. Per company policy, I had to take a drug test. The person who administered the test said that I was "borderline positive". I don't even know what that means, but I was fired because of it. I was a truck driver prior to this, and DOT mandates drug tests which I have passed. My most recent drug test was given to me in March in CA (I'm from Michigan) which I still have the results of. I also spoke with an occupational health clinic where I have taken ALL of my occupational drug tests, and they have a record of ALL the results of the tests I've taken there. The test the employer gave me was an instant test, which I did NOT see the results of. I don't care about the job, I care more about my character and my integrity. Do I have a case?