First off, you cannot have ever sealed or expunged anything else. You will also need to determine whether your charge is eligible for either option. The statute provides a list, but an attorney can assist.
If you were arrested, but your case (1) was not filed, (2) was dismissed by the prosecutor or (3) the judge, or (4) you were found not guilty, then you are eligible to have your criminal record expunged.
If you were arrested and later found guilty by plea or verdict, and the adjudication was withheld, you are eligible to have your criminal record sealed.