In your dream about a wedding that was both frightening and peaceful, several symbols stand out. The key symbol here is the "wedding" (زواج), which in Islamic dream interpretation often symbolizes union, commitment, or a significant change in life. The dual feelings you experienced—fright and peace—may reflect an internal conflict or major life decisions you are facing.

Islamic Interpretation:

1. Wedding (زواج): Traditionally, a wedding in a dream can signify a union, perhaps a blending of different aspects of your life or a new commitment. It can also indicate personal growth or transformation.

2. Fright and Peace: Experiencing both fear (خوف) and tranquility (سلام) signifies a duality or conflict you might be experiencing. Fear might represent concerns or apprehensions about a coming change, while peace suggests a faith or trust in the unfolding of events.

Personal Interpretation:

This dream might be reflecting a phase in your life where you are confronting both fears and hopes regarding a new chapter. It could be a metaphor for your journey towards achieving balance and harmony despite uncertainties.

Spiritual Reflection:

Consider how this dream urges you to seek balance and maintain trust in Allah's plan. In moments of fear, remembering the wisdom that accompanies trials can be a source of peace. Reflect on your current life decisions and look for ways to embrace both the challenges and the blessings they bring.

Pray for guidance and clarity from Allah, and perhaps perform Istikhara (استخارة) if you're making a significant decision in your waking life. May Allah ease your path and grant you understanding and tranquility.