I'm truly sorry to hear about your loss. Dreams involving loved ones who have passed can be deeply emotional and significant. In your dream, the setting of being in a strange place and struggling to find your way may reflect feelings of confusion and searching for understanding after your son’s passing. The darkness and inability to sleep can symbolize the grief and turmoil you may be experiencing.

Seeing Jamie clearly in your dream could represent a visitation or a moment of connection, suggesting that you may still feel his presence in your life. His reassurance that he is okay, despite initially feeling scared, could be a comforting message from your subconscious, indicating that he is at peace.

The detail about the turquoise top and his thinner appearance may symbolize how you remember him versus how he is now in your mind. His gesture of pointing and the mention of something being the "wrong size" might indicate that there are aspects of your life or emotions that feel out of balance since his passing.

The dream concludes with Jamie needing to leave, which could signify the ephemeral nature of those moments and perhaps a gentle reminder that while he may not be physically present, the love and memories you shared remain.

It might be helpful to reflect on your feelings and thoughts surrounding this dream, as it can provide insights into your healing process. Consider journaling about it or discussing it with someone who can support you in navigating your grief. Remember, dreams can serve as a way for us to process our emotions and maintain connections with those we've lost.