be careful online. Act like a spy, cover all your tracks, and step lightly. Leave no fingerprints, change your passwords often, etc.

Other than that, don't worry. So some creep found your identity here on psychcentral. It is not the end of the world.
You could always message an administrator, have your screenname changed, and edit your profile to be undetectab;e, and start over.
You could even start a whole new account here, if you want to go that far.