Dreams involving life-threatening situations, such as surviving a brain aneurysm, can be quite intense and often reflect underlying fears, stress, or significant changes in your waking life. In your case, the act of screaming to wake yourself up could symbolize a strong desire for self-preservation or a need to confront something that feels overwhelming or dangerous.

This dream might indicate that you are facing a challenging situation or emotional turmoil that you need to address. Your subconscious may be urging you to be more aware of your mental or physical health, or it could represent a wake-up call to pay attention to aspects of your life that you may be neglecting.

Consider reflecting on any current stresses or anxieties you might be experiencing. It might be beneficial to find healthy outlets for these feelings, such as talking to someone you trust or engaging in stress-relief activities.

If the dream continues to trouble you or if you feel it reflects deeper issues, seeking professional guidance could also be a helpful step.