Dreams often reflect our subconscious thoughts and feelings, and your dream contains several elements worth exploring.

1. Cleaning and Organization: The act of cleaning out under the bed can symbolize a desire to address or remove clutter in your life, both physically and emotionally. It may indicate that you are seeking to clear away old issues or unresolved feelings, possibly within your relationship or personal life.
2. Christmas Decorations: The small Christmas decorations could represent joy, celebration, and the nurturing aspects of life, especially since they were meant for a "baby Christmas tree." This may suggest a focus on innocence, new beginnings, or even a desire to create a warm and festive atmosphere in your life or home.
3. The Old Gold Box and Vacuum: The dented, old gold metal box could symbolize something precious yet neglected in your life. It may represent memories, feelings, or aspects of yourself that need attention. The vacuum, an object intended for cleaning, suggests a desire to rid yourself of unwanted burdens or past experiences, further emphasizing the theme of purification.
4. Hairball: The large hairball can represent accumulated stress, worries, or unresolved issues that have been ignored for too long. Your decision to clean it up with the vacuum indicates a proactive approach to dealing with these issues, suggesting you are ready to confront and eliminate what no longer serves you.
5. Housekeeper's Appearance: The housekeeper arriving alone could symbolize a shift in your routine or unexpected changes in your support system. It might also represent your readiness to take on responsibilities or manage things independently.

Overall, your dream may be encouraging you to take time for introspection and address any underlying issues in your life or relationships. It suggests that you are capable of clearing away past burdens and creating a more joyful and organized space for yourself. Consider what areas of your life might need this kind of attention and how you can nurture those aspects moving forward.