Child support enforcement usually does not deal with visits. As never married, You have no visitation rights until you fight for them. Here in Florida you do that with a Petition for Paternity, Support and Visitation. I am unsure in Virginia or Nevada. You should have received notice of the child support and if you were overseas or object based on no notice, you need to notify the court immediately of any objections. You need to contact an attorney asap. Child support is usually based on guidelines and 600 does not sound way off. My advice is to interview several attorneys and see which one's philosophy, experience and personality match the best with you. Best of luck.