To have wondered if I was dead?

[Twirlbitesruinedmylife]

I had a bad car accident and was lucky to escape with only minor injuries. In the days that followed I became troubled by the thought that either I might not have left the car and might now be in the last moments of life imaging the life I would have had or that I was dead and was just imaging being alive. I mentioned this to my mother and a psychologist who both reacted as though I was nuts.
I had a young child at the time and was frightened that if I pursued things she might be taken away. I googled it and found nothing helpful. Eventually I came to a place where I realised my life was just too mundane to be the product of the imagination.
But I just wondered if others had ever experienced this or knew anyone who had?

en.m.wikipedia.org/wiki/Cotard_delusion

Interesting. I remember in Girl, Interrupted the main character Susannah who had borderline personality disorder (a condition which usually has disassociation as a presentation) believe that the bones in her hand sometimes disappear. I wonder if that is the same thing?