I was sitting in my room at my computer. My sister, who is much bigger than me, entered screaming at me. I proceeded to exit the room, when at that point, my sister struck me on the left side of the face. I tried to get away, when at that point, i struck her three times in attempt to flee the situation. There was a fire arm in the room, and no other exit. My sister had recently been released from a mental hospital for a suicide attempt, and my mother can attest to her frequent violent behavior. She does not live with me and my mother. I was arrested and charged with "assault on a female," I believe this is a domestic case. My sister has agreed to drop the charges. What are my options? and how should I proceed?