You should immediately change your NetPassword at http://netpassword.msstate.edu.
You can contact to the ITS Service Desk at 662-325-0631 or servicedesk@msstate.edu to see if your account has any logs of inappropriate access.
Depending on the situation and what information was exposed you may need to contact University Police at 662-325-2121.
Additional identity protection information is available at: http://www.infosecurity.msstate.edu/idp/steps/