I know that many people here dose several times a night, but I'm currently against it, due to my own bad experience, and my girlfriends'.
Every time we experienced the same that you're describing, it was when we did it twice or three times a night. It felt like our brain was "saturated", like turning stupid. Time stood still. The vivid open eye visuals suddenly turned into dark ones, sad, eerie. The nice melodic music turned into random noise. I had my phone in my hands, and I could see the screen, but all I could see was like Chinese symbols. My girlfriend had an even more terrifying experience.
We also experienced that in those cases, the effects took way longer to wear off, which matches with the sense of "saturation". Scientific hypothesis: a saturation of the enzymes in charge of the cleaning up.
For now, I'll keep a day between experiences, at the very least.
Let's be honest: the Questionnaire is toooooo long and deep!
"One has a moral responsibility to disobey unjust laws" - Martin Luther King