Thanks! I am doing much better! It didn't feel like an illness (I'm rarely sick, and there were no other symptoms). It acted more like allergies. I've never had anything like allergies before this year, and I strongly suspect that it isn't actually a physical allergen which has been troubling me, but rather a stress-related reaction. I just wish my body would realize that the reaction *increases* my stress, and is not helping. sigh.

Fortunately, being productive on the project *is* fun...