Actually it were 3 times but i can´t remember anything from the first time. I was a child and i got hit by a truck and that´s it. Nobody could tell me what happened to me. I was the only witness and the driver wasn´t looking. After i got hit everything went black and i woke up in a hospital but i couldn´t remember the accident. I still don´t know what happened to me. The memories never came back.
The second time was pretty stupid. I drank to much on the graduation party. I never refused a bet when i was a teenager and someone told me i couldn´t drink a full bottle of Vodka at once. I proved them wrong. The doctors told me i nearly died that day but again no memories of what happened when i collapsed and me waking up in the hospital. I never got drunk again.
The third time felt more real this time and i never lost my memories. I was so close to death i could practically feel its touch. I had a ruptured appendix and the operation got very complicated and this time i actually died. I was gone for 1 minute but nothing happened. No light,tunnel,angels or anything else just silence and darkness.
I nearly died 3 times and i´m stlll standing. I don´t know if a afterlife exists but i saw nothing. Maybe i was already in hell...
While all three experiences must have been fairly traumatic since they were definitely brushes with death and mortality, I think that only the third grave encounter can really count as a “near death experience.” I read an article earlier this week by a physician that said we aren’t truly clinically dead until the blood flow has stopped for ten minutes because otherwise there is still oxygen getting to the brain. It’s why barring complications and internal damages, we could still come back from the brink. In the second close call the doctor said you “nearly died”.
If you saw nothing it could be because your spirit did not leave your body. It may have stayed put and the “nothing” or “blackness” was the result of being trapped in a shut down physical vessel, your senses not working properly at the time. It is like how many people fall asleep and then wake up hours later feeling like they just shut their eyes. Some people can feel like they don’t dream but science says we almost always have dreams even if we don’t remember them (though some rare individuals really aren‘t capable of dreams).
Or your mind could be blocking the memory the way it did with the first two incidents. When things are too traumatic our brain can prevent us from remembering. It can be a coping mechanism or just a misfiring of synapses. A lot of people do not have the memories of being in vehicle accidents, having heart or asthma attacks, being in fires, physically assaulted, etc. I know someone that doesn’t remember two years of her life because it was a bad time for her. I refer to it as her own “dark ages”.
Remembering only blackness reminds me of the nihilist theories of death and the afterlife on the Doctor Who spin-off Torchwood.
I am definitely not going to presume to know what you experienced and tell you it wasn't this or that. However, I doubt it was Hell. If it was then I think that you are lucky to have been brought back and only shown a glimpse of that dimension. Sometimes humans are given peeks or even tours of various afterlifes (Heaven, Hell, etc) to gain knowledge, spread the word (of whichever religion, spirituality, or entities), reach enlightenment to become an important figure. It doesn't necessarily mean that is the afterlife or post-Earthly existence you are going to be sent to when it is your time.
The Hell described by some "NDE-ers" involves being ripped apart by demons, in flames without their bodies being destroyed (but still feeling the pain), poked with spears, turned into skeletons, worms crawling through their insides, etc. In some ways experiencing an eternal nothingness is just as bad as experiencing eternal pain. Did you feel like you left your body and were in a place that was pitch black with no sound?
I ask this because last year I had a health scare. I walked my dog on a very windy day and then went to cash my paycheck in a smoke-filled casino. I gues the lack of air for a long period of time got the best of me. When I was in front of the teller I went blind (couldn't see anything for about ten seconds) and I couldn't breathe, I was sweating, my hands were tingling and I couldn't move them, and then my legs went out. A security guard had to hold me up until they got a wheelchair. And an ambulance was called and two paramedics checked to see if I was okay and were going to take me to the hospital but I waved that off (I didn't want to pay hospital fees, I owe $3000 from when I got pneumonia at 18 *lots of tests before they realized it was just that*).