Restraining order

I met a girl online 2 weeks ago and we went out for drinks a couple of times. We texted back n forth for a few days. Then I met her 2 days ago and we were hanging out in the car when she suddenly walked out of the car and called the cops on me. She said I am trying to hack her phone and harrasing her and following her. I have known the girl for only 2 weeks and have no reason to be doing that. Cops came and I told them everything and they told me I am good to go. Today I got a call from court house saying there is a restraining order against me and I have a court date. I am not sure how to proceed. I did not do anything wrong or harras that girl. I want to know how can I fight my case and also is it possible to file a complaint against the girl for making false accusations and giving me mental stress?