Do I have a right to sue?

I went to lab Corp today (11/30/2012) to give a urine specimen for a Pre Employment drug test .We went back to get my specimen and the lady tells me that she can’t accept my sample because it is too warm(this is understandable).I drank some water waited 45 mins and then gave her another sample. This time it was ok. She started to make conversation stating "I hope I didn’t feel as though she was picking on me?" and she continued to ask me where I worked etc. She gave me my slip and I left. I recieved a call about 10 mins later and she says Ms Pittman can you come back to the office I forgot to give you something. I arrive at the office and she asks me to go back to the lab room with her. I walked in and on the counter sat my two specimens with two dip sticks laying on the top of them, she asks me to look at both of the dipsticks and tell her what it says I’ve tested positive for. I look and it says I have tested positive for Opiates and Marijuana. So I tell her what I see. I immediately become confused and deny it, she says " you can tell me!" . I continue to denying this to be true because I do not do any kind of drugs and I’m not around anyone that does. She asks me what I would like her to do? I tell her send it because It’s my word against the tests and I’m telling the truth so there isn’t much I can do. So she says "well Charlaine I can run another test but we would have to charge you" so I tell her no(what is the point), she continues on to say "well I’m going to help you out"(at this point I’m even more confused and just look at her ) she asks me if I heard her? I continue looking at her. She states" you seem sweet so I’m going to submit a clean test and just look at it as a blessing!" and throws my samples in the trash