Yeah, not so much. The chills hit around when I went to bed, and I am still feeling astonishingly craptastic now. I am giving myself a rare sick day from work. (Yes, I'm still checking Slack and email occasionally, but that's about it.)
Could be worse: it's still not nearly as bad as getting the actual flu. Really, it's remarkably like Day 3 of the flu -- remarkably exhausted and brain-dead, but I'm actually capable of getting out of my chair, and even standing for ten whole minutes.
And on the bright side, I can't do any of my high-stress projects today, so I'm going to "enjoy" just sitting and reading comic books, which I haven't done for more than an hour in who-knows-how-long...