Dreams about being in school often reflect feelings of anxiety or pressure related to performance and expectations. In your dream, being at your elementary school instead of your middle school may symbolize a desire to return to simpler times or a feeling of being out of place in your current situation.

Forgetting your music suggests feelings of unpreparedness or insecurity, which can translate to real-life situations where you feel you may not be ready for an upcoming challenge. The act of going back and forth on stage indicates a struggle with self-confidence and the fear of judgment from others.

The black clothes may represent a desire for professionalism or adherence to certain standards, and their absence highlights feelings of inadequacy in meeting those expectations.

Overall, this dream could be reflecting a current stressor in your life, perhaps related to performance or social situations. It might be helpful to identify any areas where you feel unprepared or anxious and find ways to address those feelings. Consider practicing self-compassion and preparation techniques that can help you feel more confident in similar circumstances in the future.