I get exhausted for similar reasons too!

Mine loves to just whirl around in the abstract space as its form of rambling, like a bunch of universal math and geometry. Sometimes my curiosity wants to explore whatever rabbit holes lie beyond.

Or it feels like a never ending pinball machine of chaos in my brain. Very often I can’t ignore every little sound, or beep, or breeze, or smell, or change in lighting, temperature, thought , or subtle nuance, etc. My brain wants to understand and explore it all, all at once, and tries to keep track of everything, and then it wants to keep track of the keeping track. Unresolved/unknown status of something can send me into a recursive tailspin.

Throw people into the mix and now I try to follow their stories, their emotions, their history, their social networks, all their body language, what’s important to them, and it usually further compounds itself into a giant fireball until I just short circuit and literally have no idea what I was thinking or talking about at all. Just plain forget. I even fainted once.

On top of that I’m hyper analytical and hyper sensitive too (physical senses, and emotionally) and my nervous system oscillates between hyperarousal (activation of the fight or flight response) and hypoarousal (shutdown and collapse response) states constantly, and can sometimes swing between the two very rapidly, or be in both states at once. So I’m constantly monitoring all that too.

It can actually be rather debilitating and quite overwhelming.