I have answered a lot of these questions, but I will go a bit deeper.
The tansition from reality to the other place was very smooth. As though I momentarily lost consciousness and just kind of landed there. It was the transition back into reality that was kind of hard. It wasn't as though my body was rejecting my soul, it was more like it didn't recognize it. The first time I came back reciting all kinds of basic personal information. My name, occupation, phone number, address. Over and over again I was repeating these things outloud as though I was trying to talk a bouncer into allowing me access to a crowded club.
Did the transition feel right? Hmm. I am not sure that change ever feels right. The transition from my warm bed to the open air feels wrong every morning when I wake up. The transition certainly didn't feel right or wrong. Now, about 2 years after the fact, I feel a little bit like it is wrong. Not like morally wrong, because I believe that we all have our place in that place. I think that I felt like I had arrived early? The "entities" treated me like I was early. Not wrong exactly, but like getting to your in-laws a couple hours before everyone else I felt like they felt like they were obliged to entertain me as long as I was there.
Oh there are levels to be sure. I did not achieve nirvana, but I was definitely enlightened. I have never felt fear of death so it did not change me so profoundly that I got over a phobia of dying or anything, but like you said about feeling like you had always been there, and my experience validated that for you somehow. That is exactly what it did for me. It woke up cell memories that my body inherited from my spirit. I also caught very short glimpses of my former selves, and I have actually enjoyed relief from physical symptoms of illness, malady, whatever that were unexplained before. Now my subconscious just realizes that I do not have a hole in my stomach in this life, so my chronic heartburn went away. The experience validated that the place was real, and that we have all been there, belong there. I could have gone farther. I could have gone much farther. While I was there I realized a universe completely free of suffering. When I came back, that universe was vapor. If I could have made it stick- then I would have been as far as I could go.
There was no confusion or displacement, amazement- nothing like that. I felt like I was exactly where I should have been all along. I was in a place so familiar that I had never left, or that the amount of time I was gone was a fraction of the blink of an eye. It was very comfortable.
There is no physical body. Or physical anything for that matter.
To be able to visualize the Universe in a grain of sand. To be able to understand the place for every grain of sand in the Universe. That is about the extent of the infiniteness of the possibilites. I believe that in that place, you are in the arms of spiritual enlightenment. Absolutely no limit. There is no higher truth.
The script I was looking at was written the moment that my spitit breathed into my body, before I was born. The entire script was written before I was born, and it was written by me for me for this life.
The entities were intangible. They were voices in my head, they could not be described in any physical sense of the word. The first time I did DMT, I couldn't see them. I knew they were there, but I was expecting to see them. I felt like they were hiding from me. But now I realize that they are not visible. My awareness of them at all is because I got closer to the understanding that we are all one thing, spiritually.
I don't think I lost any part of myself. I feel like I am different in many many ways. I think the parts that are absent are parts of my former selves that my spirit didn't let go of from one life to the next. I am a more distilled version of myself for this life and time. I have had some health changes, but only problems that no doctor was able to explain. Like mystery ailments and such that I am happy to be rid of.
That's all of your questions I think. I hope it helps.