The Book of the Dead.

Weird episodes of detachment and duality.
It first started about a week ago now, at least that's when I noticed it. Some of which I have wrote here already.
I at first felt like I was in two places at once, like a kind of split, or feeling of a dual self.
I had this feeling of a part of myself that was floating in space, like a kite on a string, the feeling was right in the back of my head physically.
Emotionally I felt myself, or a part of myself as detached from earth or the living world as we understand it. There was a feeling of death, as we understand it, and yet I could still sense myself in that place as something existing just as I am here now.

Then just yesterday
I had that feeling again, yet instead of space or a dead like self, it was a sleeping one.
like I was aware that I was awake but I could feel and see my unconscious mind in an inner picture as a sleeping self in a kind of sleeping buddha pose. I could feel my mind, like there are two halves.

What does all this mean?

Most advise that I keep journaling about it. I haven't really found anything online exactly like this. Anyways so that happened.