It was probably a summary offense so a citation would have been issued. You most likely paid a fine and the case was over. The good news is that you are able to have the case expunged five years after the case was concluded. You should hire a criminal attorney to handle this for you.
I agree with my colleagues, the summary citation is not sealed. However, you may file a petition to have your record expunged as a juvenile if you have been free of all criminal activity for 5 years from the date of the summary conviction.
Responses on AVVO do not create an attorney-client relationship. You shold consult with counsel for a full review of your case.