Fortunately, nothing close to what I experienced nearly a month ago has happened again.
According to the results of some searching online based on how those two experiences occurred and how they felt, I may have had "low blood circulation to the brain".
It seems crazy that I'm "okay" after that...but I've experienced excessive drainage of cerebrospinal fluid (what hydrates the brain) and I've survived, so I guess I'll still be "okay".
Some things are becoming increasingly difficult while others are still "a work in progress", but I'm happy to have the challenge.
Helping myself is one of the things that makes life worth living.
It's great that the amount of time my body has been recovering from a lifetime of having excessive pressure in the brain and damage caused by that has been progressing in a positive direction so far.