I know what you mean. I've got two elderly parents in the house also with underlying medical conditions, and here I am still commuting on trains to work every day. I'm terrified of bringing it home. I've been run down and overworked for weeks but my paranoia got the better of me today. I've been imagining the beginnings of a sore throat for days, intermittent dry coughs for no reason and this afternoon freaking out that my face was feeling all hot and flushed.
Probably doesn't help that today is the nine year anniversary of dad's cardiac arrest.
I think - hope - this is all just psychosomatic.