What should be done if someone lies and makes 2 false statements to the police on two separate occasions?

In August 2016, I was arrested for, 5th degree assault on my roommate which led to me being arrested. I tried to tell the police that I was the victim and not the roommate (she had not one mark on her) and that she was lying. I sustained a 4cm. laceration under my right eye and numerous bruises and scratches all over. My roommate, recanted her statement and I was charged with disorderly conduct. I am currently on unsupervised probation. On March 22, 2017, I went to the apartment we shared to grab a few things because I have been moving things out a little at a time. I noticed she was drinking and roommate gets mean when she drinks, so I rushed out of there with my purse, my back pack and my boots on my left and my 6 month old pit/lab on her leash in my right hand. As I was walking out the door, roommate pushed me and I yelled for someone to call the police. I grabbed my boots which had fallen when she pushed me. I ran off the porch and on to the side walk and began to walk away. Roommate stood on the porch yelling and screaming. I never looked back and walked 3 miles to my sister's house which took me about 2.5 hours. I was there maybe 10 minutes and got a call from an officer telling me he needed to talk to me. He told me he had enough evidence to charge me with assault. I told the officer I hadn't been there in hours and that she was lying again. Not having much faith in the police here, I chose not to walk back the 2.5 miles so I could be arrested and my dog out in the pound. I had court and plead not guilty. Today is my hearing. I forgot to mention that roommate is on supervised probation and drinks almost daily. Also, I have never been in trouble.