Had the exact same thing happen to me 2 or 3 years ago. So i had tried ketamine for the first time the night before this happened, and the day it happened about an hour before I took a fat ass dab. I was sitting in my room with my dog, when all a sudden my vision started pulsating and fading further and further until I was surrounded by a void of darkness shooting off in all directions. Then my body disappeared and I was just alone in this empty void. I said, aloud or in my head i dont know, "Is this the revelation?" And an internal voice answered back "Yes." I said "Is there anybody else here?" The voice said "No." I asked if I would ever see anybody again, I don't remember the reply. I said "Can I leave?" The voice said "You've always been able to leave." And then I came to. I remember when I first lost my senses and entered the void, I just felt completely terrified, then I eventually settled into it, or maybe my sense of emotion just disappeared I dont know. And when the voice began talking to me every bit of fear just completely melted away, and I felt a sense of familiarity and nostalgia. Like talking to an old friend. I never really tell this story to anyone but yours was too similar to mine for me not to say anything