Try Recuva (Google it), or any of the recovery apps on Google Play. But be warned, there's a fair chance you may not be able to recover them. Backups are your friend.
If it's important enough to cause you grief if it's lost, back it up. No excuses
Trolling for thanks is lame
Does Samsung's auto-brightness implementation crap drive you to self-harm ? A solution !
Failure to search is the leading cause of male impotence on XDA
If you don't know how to recover if things go wrong, what are you doing flashing custom roms ?