"Thinking about it turns into reading about it, reading about it turns into researching it as thoroughly as possible, research leads to investigation, and the rabbit hole of my obsessions just goes and goes, and then as suddenly as this obsession starts. It’s gone. Complete and total disinterest, just like that."

This kinda sounds like dopamine drills for people with ADHD and/or autism. I know that, because I'm like that. And I, too, have found myself in some bizarre and scary rabbit holes because of that. Be careful out there, OP, sounds like you could have died because of the obsession...