You seem to have only just created your account, according to your profile, so I'm not sure which old questions you mean.
If you mean questions asked before the migration to the new platform, then they are in an "archive" accessible from the "Community" menu above. You can search the archive for your name, for example, to find any questions you might have asked. Although such a search produces no results, so I assume you didn't post any questions under your current name?
Hope that helps...