Hey. I'm afraid I can't tell if you have HPPD or not, as I'm not even sure about mine. I think though that I can say something about the spiritual part of your perception. Usually psychedelics show you what you already knew and wanted, altough they could make you understand these things much more deeply. The point is that's not really the objective truth, and we are still barely evolved apes, homo sapiens, just with an intoxicated brain. Even if psychedelics show us some things in a way that could be very close to the way they really are, all we find are still only our own thoughts, which are just models, attempts to describe something that we perceived through an enormous amount of distortions. There is no magical way in which we could connect to the divine, all we can do is get some taste of it, or rather taste of a mental construct we think of as the divine. Approaching it without caution might result in many bad things, just look at the history - it's full of many honest people that turned off their critical thinking at some point.
What I'm saying is that although psychedelics are an amazing tool at deeping our understanding of ourselves and the universe (which might be actually the same thing, depends on your perception), they are just that - a tool. They aren't (sadly) a magical key to the objective truth, God, Brahman, Tao, however you call it. All we can do is expanding our knowledge, experiencing as much as possible, thinking critically, keeping open mind, confronting our views with others, and repeating the whole process. Still, none of us will be 100% right at the end anyway, but luckily that's probably not what life is about.
Good luck on your journey!