Tracking issues and data to figure out why I'm sick, using this Kanban board. Update: Thanks to this process, and the contributions of dozens of people here and on Twitter, I'm cured. The problem turned out to be chronic sleep insufficiency.
In the last week of August 2017, I developed the symptoms of a cold. It remained low level until September 4 2017, when I felt sick enough to take the day off of work. I never got better. After a month I figured I'd developed seasonal allergies (something I've never had before), but the symptoms were not alleviated by either taking over-the-counter allergy medications or by a week-long trip to India in October. In early November I finally went to my physician, who prescribed allergy medication. That began months of medical appointments to try to identify the source of the problem.