Ugh

Among the various medical things I did yesterday was my annual flu shot. I assume it's a coincidence -- I have never had a significant reaction to a flu shot before that I recall -- but today I have been feeling worse and worse as the day goes by. Sort of generally achy and tired more than anything else. Hope it's not serious -- I have to fly to Chicago next Wednesday for a training class on Thursday (returning Friday), and I don't like traveling while sick.