Possible Clues:

• Loss of nerve
• Strong apprehension
• You'd have them if you were afraid to proceed
• You might have them if you're afraid to proceed
• Loss of courage
• Loss of confidence
• You may have them if you're afraid to proceed
• Lack of confidence in college is not new and is a measure of something else
• Wedding day jitters
• Measures against viral infection result in loss of nerve