Imaginative harment complaint?

I am working for a consultant company and I was contracting for a client company. At the client company, I got acquainted with a married woman through a meeting who was also a contractor but from different consultancy. She usually keeps talking non-stop, was very friendly, willing to help when necessary. Since she used to talk about all kind of things including personal stuff, I was also talking to her in a friendly manner. All of a sudden, it looks like she probably started imagining things. When my ignment was supposed to end at the client company, she filed a harment complaint stating that I had been following her and I had been staring at her office from the stairs. But, she never mentioned to me about this until the last day. Whenever I see her, she either has a smile on her face or say "hi how are you". I was shocked when I heard that she filed the harment complaint. Because of the complaint, the client company fired me from the contract position and asked me not to enter the building. I am still with the consultant company though. She is still working happily in the same client company. My consultant company had some discussions with the client company to get the exact details of the complaint. My consultant company asked me like around 50 questions related to the complaint and I answered them all. There is a committee in my company which will discuss about this case and take a decision on this. If my company decides that the complaint is false, can I file a case on her for punitive damages? In the worst case, if my consultant company decides to fire me or ask me to resign, what are my rights? Can I ask them for a third party mediation? Or, should I contact a lawyer? I live in Texas.