I would suggest that you actually show up at court tomorrow. There is a decent chance that your case will be heard tomorrow. But even if it is not, you will want someone to give you written proof that you appeared and written confirmation of your next court date. That way you avoid any possibility of a warrant going out by mistake.
Try searching the Court Webpage at the URL:http://www.courts.state.va.us/caseinfo/home.html
If your case is in either the General District Court of the Circuit Court, then find your name and click on the link to see the updated Case Information.