> 2. I experimented with diet, and found that a low carb diet reduced my symptoms quite noticeably. I continue to be shocked by what an affect my diet has on my experience and behavior.

Same. Switching to Keto definitly impacted my ability to focus and think clearly. Not sustainable for the long term, but cut out as much of the refined carbs and sugars as possible. Dialed back the coffee, too -- big difference.