That’s an interesting story. What changed your mind from believing this was a response from “something” having communicated with you to it was cooked up by your mind? Why did you give up after trying Christianity rather than exploring other spiritual callings?
It's a long story, but this how it went. Having "established contact" so to speak, I joined a Christian church (United Methodist) and joined in the activities there. I continued with my "conversation" with "something" and felt I was guided to certain things, like the writings of Marcus Borg and a group in church that was also exploring Christian belief. Though this all seems vague there were other things that helped my belief. I asked for help in my attempts to be a better person, and that seemed to happen. My shaky relationship with my then wife got dramatically better.
Anyway, this continued for some years. Then the marriage went back to "normal" and we got divorced, and I found myself less and less interested in attending church, until I never went at all. I no longer felt the presence of "god' as I once did. I found myself realizing that it had all slipped away.
So, the "cooked up" thing is just my best guess. Maybe God got fed up with me not believing in the Trinity and gave up on me. Though I've had my mind play the strangest tricks on me before, so it's not totally unreasonable.
As for trying another religion, it wasn't Christianity that didn't work, it was my total search. In a sense, I no longer felt the urge to get to the bottom of things religious. I went to the bottom and it was empty. For me at least.
The good thing (there has to be something, right?) is that I seem to have settled down to be comfortable with "I don't know" about spiritual matters. Maybe I'll find out when I die. Maybe not.
Oh, and I come here because I enjoy discussing things.