Duke Zhou, what does it mean to dream that you are standing next to an empty coffin? Please explain.

I have a lot of pressure in my heart, and I am in a sub-sleep state, in a trance, half dreaming and half waking. As the saying goes, think about it day and night, and dream at night. Dreams are born from the heart, and the dream scene itself is illusory. Perhaps it is some psychological pressure that leads to many dreams recently, so it is better to adjust yourself reasonably. Hope to adopt