"I've been feeling rather cruddy the past couple of days...."


Are you certain 'the crud' is not from being sequestered inside given the weather outside? ie the heat you have been having (I have been monitoring it all on the Weather Channel)
Inside air is quite bad, even if we have filters and humidifiers etc.
I mean it could be other but. . .the air gets close anytime a person is
sequestered inside.
At least that is my take on it.