Get on the phone right NOW. Call the sheriff's Dept. and explain what happened . You might have to go down to the jail and talk to the night Magistrate and be put on bond, That is a whole lot better than a policeman coming to you're house and arresting you and you will have to sit in jail until court. Judges do not play around with Court appointments,they will issue a werent to bring you back to Court in Cuffs. Do not run either because that just makes it worse. Please trust me...Do the correct thing tonight. It is you're future that is at stake.