A lot of what you described--your hyperstimulation periods followed by the need for solitude to recharge, for one--sound very similar to my mood cycling stages. Also the obsessive knowledge gathering, to the point of exhaustion and beyond.
I’m bipolar and finding that out, while hard at first, actually led me to many freedoms, many just from the fact that I didn’t have to spend every bit of energy acting like nothing was fueling certain behaviors I had never understood.
Good personal essay. Happy to know you are finding some peace in and acceptance of your newfound vulnerability.