It was neither a cold or the flu from which I suffered. To the best of my knowledge viruses do not work on a time clock, and my symptoms were punching in at 5 PM and punching out at 5 AM.
What I had were allergies, but I couldn't begin to guess the source of my suffering. The pollen count was low and we'd been in a dry spell for weeks so mildew wasn't much of a possibility either.
But I suppose that doesn't matter anymore because to my great relief it rained last week and washed whatever it was out of the air and I can breath again.