Dreams involving bathrooms often symbolize a need for cleansing or personal reflection, as they are private spaces where we tend to confront our physical selves. In your dream, the presence of your mom might indicate feelings of familial expectations or the influence of your upbringing on your self-image.

The act of losing your hair in the dream can be quite significant. Hair often symbolizes identity, self-esteem, and personal power. Losing it may suggest feelings of vulnerability or anxiety about how you are perceived by others. The fact that you were holding your hair indicates a confrontation with these feelings—perhaps you're grappling with issues related to self-worth or changes in your life.

The mirror represents self-reflection and perception. The fluctuation between having hair and not having hair could symbolize uncertainty about your self-image or the way you present yourself to the world. It suggests a struggle between how you want to be seen versus how you feel internally.

Your instinct to shave your head could symbolize a desire for a fresh start or to rid yourself of concerns that may be weighing you down. However, the realization that your hair was back only in your mind points to a deeper issue: perhaps a fear of losing something fundamental about yourself or an inability to fully accept changes in your life.

Overall, this dream may be urging you to reflect on your self-image, the pressures you feel from those around you, and your desire for authenticity. It might be worthwhile to consider what aspects of your identity you feel uncertain about and how you might embrace those changes more positively.