This is HN so I'm not trying to evangelize you or anyone here, but what you described is 100% in line with Spiritism [1], a French-founded doctrine that's very popular both in France and Brazil [2]. I'm a believer.

[1] https://en.wikipedia.org/wiki/Kardecist_spiritism

[2] https://en.wikipedia.org/wiki/Kardecist_spiritism#cite_note-...

My memory is a bit hazy, but I thought what you are describing is very common with people who flatline and come back? I have vague memories that a new anesthetic drug was developed and used on soldiers undergoing surgery in the Vietnam war, and there was something about it that caused the same kind of reaction in those who were put under. Again, my memory is very hazy on the subject. I should go do some research and update this comment (and I just might).

EDIT I did a little searching. I think it might have been an old report about Ketamine before it became more wide known. Apparently it was used during the Vietnam War.

https://en.wikipedia.org/wiki/Ketamine#Near-death_experience

It matches what I briefly experienced when I felt ill staying alone in a hotel. (E. g. I understood that the events of the few recent days were sort of preparing me for that; I could ask questions.)

BTW there's a book "The night of fire" by Eric-Emmanuel Schmitt that describes a similar experience he got staying alone in a desert. And, of course, countless other descriptions, e.g. "The varieties of religious experience" by W. James. You cannot convince anyone, of course; but there's also no way to fake it.

I've written this about 20 years ago in haste and bad english:

https://www.nderf.org/Experiences/1kevin_p_nde.html

Which isn't my real name btw. They pseudonymized that.

I don't know, this sounds like your subjective experience, I have no reason to disbelieve it. If you had said that your experience showed you the future, and X Y and Z were going to happen, then I might not believe that, but why wouldn't I believe you experienced what you say you did? Why would you lie?