What do I do if I have a warrant that I didn’t know from seven years ago?

I had only drank 2 beers and was walking home in a small town two blocks away. I was not stumbling. I had myself wrapped because it was chilly. I had a couple people including my boyfriend at the time who all bolted the moment they saw the officer turn. I am from a larger city and knew I had no reason to run so I continue to walk. I'd moved here just a few weeks prior. My boyfriend was we'll disliked by this officer who was fired for getting drunk and fighting off duty. He stopped and asked me where my boyfriend went. I said I had no clue where he was the asked the officer if my street was one or two more blocks ahead. I told him I was new to town, he said "I know exactly who you are where's your boyfriend I want his ass not yours". He then put me in the car and without any sobriety tests or anything to provoke the arrest because I just cried like crazy. I was locked up over the weekend and plead not guilty but was "advised with pressure" to plead guilty to lock me up for another 3 days. I was bonded out by said boyfriend, a week later I was shot and had to undergo a preliminary hearing. I left town found, a roommate with a child I cared for as room and board but was away for two days when police came looking for me and not telling my roommate anything. She assumed I was involved in something horrible and I was kicked out. I had to be transported for 8 hours to attend trial then left stranded sleeping at the park without food for 2 days. I spoke to the DA and he agreed my previous fines and case for the public intoxication was to be something I wouldn't have to worry about. I was also told by my arresting officer that he only arrested me because he wanted to teach me a lesson in dating then remarked about what I was wearing that night. Today 7 years later, I'm told they have a bench warrant and are looking for me.