Multiple times I had validated that I was visiting another place (by whatever means astral projection makes it a reality).
I did it for years and learned how to do it at will. Then, almost suddenly, I would "leave my body" and being aware of the fact, couldn't get back into my body. I could see myself. I was completely awake and asleep at the same time. My breathing would become labored to almost suffocation. I was trying to wake myself up. I had a live in gf at the time that I would try to muffle just enough audible sound just begging her to shake me awake. It became very scary and came to happen every single night.
I had no idea what was going on. I began asking for help... as much as I knew it would sound totally nuts.
An old Christian guy told me how to pray and ask God to intervene. I did as was instructed and it was the last time it happened to me.
So do I think there was an evil element? Yes. I do believe God could use it for good (and has through others) but to date He has never led me to that cause.
I have a truly incredible story about another guy I know and how it ended for him.. for another time.
In my own opinion, your prayer was heard and answered, as it represented your will and you needed the help, and only God could so intervene. You initially invited an evil entity/influence in, and sorta got hooked on the idea of your own willful way in doing something that required some (evil) assistance but you were sorta being deceived and flattered about how great you were. . . .
So I looked up a link on astral projection, as some have undertaken to be experts on the subject and "practice it". Here is one:
https://www.erinpavlina.com/blog/2006/12/the-dangers-of-astral-projection/
I link this in connection with the links to the story above, with the critical observation that in the case of the first story, I did not observe any attempt to "practice" anything, though I did observe that the context left "God" specifically out of it, and the person conveyed the idea of a reality that specifically did not glorify God, exactly. It's just a statement of what happened as she relates it.
In my opinion, anyone who dabbles in "practice" of this kind is necessarily invoking or conjuring evil as specifically prohibited in the Old Testament, in the command to not seek to speak to the dead, or do soothsaying, witchcraft, or anything like it. It violates the first commandment in a fundamental way. . . .
Is there a "further dimension" to existence? I don't doubt it, but choose to leave it in the hands of God.
Have I "sensed" the presence of specific persons who had already died? yes. Do people have a "core" identity that is not just a mortal body, and does that "core identity" have the power to see, to know the thoughts of others, or their concerns, and to move to other places in an instant? I would suppose so.
If someone told me a story about being able to float themselves around "at will", I would suppose that an entity of some evil nature was behind it, as I would judge it as a demonstration that is self-glorifying, and not subject to God in the manner exemplified by Jesus.
I have no way to verify the facts of the story I cited, but the claim is that there are multiple "proofs" in the story with people who were present and knew the order of events, and could confirm the statements made by the supposedly comatose patient when she "awoke", and in the medical facts of the cancer and it's cure.
Can God heal a person in this manner? It would not be inconsistent with many of the stories of the New Testament healings attributed to Jesus.
One thing I did respond to positively, in her story, is the notion that we do undermine our health with a lot of our "negative" emotional baggage.