I’d add the calcium from the water as a factors

Brain can put its spin on perception, especially when tired or agitated, like, when anticipating something out of worry/fear (which can be somewhat subconscious).

But yeah having talk with a doctor is not a bad idea.

There are pro users that don’t need anywhere near that much memory.

Well, every computer is ”Pro” if you take professional writers as an example. But this is a marketing term anyways, not a definition. If it was an actual definition then I’d take it to cover ”most professional computing tasks”.