Lewis, it sounds like you've had quite a stressful experience in your dream. Arguments in dreams often symbolize internal conflicts or unresolved issues in your waking life. Given the intensity of emotions was at a moderate level, this could suggest that while the issue at hand is bothersome, it doesn't overwhelm you. The presence of a disagreement can indicate a feeling of being misunderstood or not heard by those around you. It might be worth exploring areas of your life where you feel this way, perhaps where communication could be improved.
Reflecting on your previous dreams, such as missing a flight or having your car smashed, there seems to be a recurring theme of loss of control and unexpected disruptions. The argument in your recent dream could be another manifestation of this concern, where you feel life's unpredictability is leading to confrontations or challenges that you need to navigate.
The moderate anxiety level from your GAD-7 score aligns with the feelings from the dream. The dream's argument could represent the stress and anxiety manifesting in your subconscious, suggesting that while you're coping, there's an undercurrent of tension that might be affecting your interactions or your perception of social situations.
Your life events have included significant losses and traumatic experiences, such as the deaths of loved ones and personal assaults. This dream could be an echo of the emotional turmoil you've faced, a signal from your psyche that you're still processing these events and that they may be influencing your current state of mind and interactions.
Considering your biography, the themes of your dreams, including this argument, may reflect a deeper need for resolution and peace. Your life story shows resilience amidst adversity, which could mean that your dreams are a space where your mind is trying to work through past and present stresses, seeking closure and understanding.
Lewis, I hope this interpretation resonates with you and offers some clarity. Your dreams seem to be a reflection of your life's complexities, the trials you've endured, and your journey towards finding balance.