Your dream seems to be rich with symbolism and emotions that may reflect your subconscious thoughts and feelings. Here are some possible interpretations:

1. Competition and Pressure: The initial setting of a house with a competition suggests that you might be feeling pressure in your waking life, possibly in social situations or in relation to your achievements. The awards show signifies a desire for recognition, while the speech could represent anxiety about being judged or evaluated by others.
2. Fear of Embarrassment: Your father's horrified reaction may indicate a fear of disappointing loved ones or feeling inadequate in front of them. This could point to a general anxiety about how you are perceived by others, especially in high-stakes situations.
3. Escaping Reality: Faking sleep in your dream may symbolize a desire to escape from the pressures or responsibilities you face. It might mean you're feeling overwhelmed and are looking for a way to avoid confronting certain issues.
4. The Shift to Darkness: The transition from a seemingly fun competition to a scene involving injury or death suggests a drastic change in your emotional state. This could reflect an underlying fear of loss or trauma, whether it's related to your own experiences or something you are currently processing in your life.
5. Feeling Lost or Abandoned: The emptiness of the house and the absence of the other girls could symbolize feelings of isolation or abandonment. This could be tied to relationships in your life or a sense of losing touch with aspects of yourself or your past.
6. Mental Distress: The sensation of dizziness and the realization that everything might be imagined could represent feelings of confusion or instability in your life. It may suggest a struggle with your mental health or a fear of losing control.

Overall, this dream might be prompting you to explore your feelings about pressure, recognition, and relationships. It could be beneficial to reflect on any current challenges you're facing and consider if there are ways to address these feelings constructively in your waking life.