Possible Clues:

• Lead-in to a bit of bad news
• "My concern is ..."
• "What worries me is ... "
• '. . . unfortunately'
• 'Sadly ...'
• 'Hate to say this . . .'
• 'Sadly, it looks like...'
• 'Don't you love farce? My fault, ___ ...' ('Send in the Clowns' lyric)
• It may precede bad news
• ''It's my worry . . .''