The whole thing was not helped by the fact that I'm at my office job. The "office" is a windowless room in the basement of the restaurant at the far end of a long narrow hallway. Upstairs contains a full kitchen, dry storage area, big dining room with marble columns holding up the cathedral ceiling, marble inlaid floor and a long oak bar. In short - a whole load of very heavy stuff.
I had to go upstairs, have some tea and breath deeply for a few minutes. Now I'm back downstairs feeling twitchy. I didn't dress for an excavation today.