Possible Clues:

• A question of introspection
• 'Am I the only one ...?'
• ''Am I the problem here?''
• "I can't be the only one thinking this"
• "Am I the only one who thinks this way?"
• Lead-in to a questionable opinion
• ''Am I to blame?''
• "Am I off-base here?"
• Self-reflective musing
• 'Am I imagining things?'