A few hours can make a big difference. Around noon I called my Mom to call my doctor for me because I didn't have the energy to talk to him myself. Now I'm contemplating trying to go to work tomorrow. (But I don't think it's very likely.)
I was feverish and achy all last night and most of the day. Fortunately, the Advil helped enough for me to go out to CVS to pick up my Tamiflu prescription.
And no, I didn't get my flu shot this year. It's a little late for that now.