You might want to consider retrying it in a "spiritual/meditative setting", i.e cozy with headset on, music pre-curated (nothing off-tune and so-on) and closed eyes then get lost to eventually breakthrough, strictly only with people you deeply trust.
I don't think it's a spiritual experience, in any way. It's just your neurons going crazy. Any spiritual result that you have had fits with how your brain is wired. The majority of the population is spiritual because in the past atheists were killed. I'm atheist and this experience was not spiritual in any way. It just enforced my atheism.