Dreams involving vampires often symbolize deep-seated fears, desires, or transformations, particularly related to power dynamics and control. In your dream, the vampire's ability to see your past suggests a confrontation with your trauma and the pain inflicted by others. This could indicate a need for acknowledgment of your struggles and a desire to reclaim your power.

The bloodthirsty rampage signifies a strong urge to exact revenge or assert control over those who have hurt you. The calmness you felt could reflect a sense of empowerment or liberation from the pain of your past, albeit through violent means. This aspect of your dream may point to the inner conflict you face regarding your feelings of anger and the desire for justice.

The wedding scene introduces a complex layer of meaning. Weddings typically symbolize union, commitment, or new beginnings. Here, the bloody wedding may represent a merging of your darker impulses with a desire for renewal or transformation. The presence of another vampire at the altar could signify a connection to your darker self or a significant aspect of your identity that is emerging from your experiences.

The flickering between the scenes of violence and the wedding may illustrate the tension between your past trauma and your aspirations for a new life or identity. It could suggest that healing and transformation often involve grappling with painful memories and emotions.

Overall, this dream seems to highlight your journey of navigating through trauma, seeking justice, and exploring the darker aspects of yourself. Consider reflecting on how you can channel these feelings in a more constructive way in your waking life. It might be beneficial to seek support from friends, loved ones, or professionals as you process these emotions and work towards healing.