Why can’t I kick this?

I could barely move most of yesterday, couldn’t stand up without getting dizzy, felt completely wiped and exhausted. It hasn’t gotten any better today. Haven’t eaten anything today. Went to bed early last night, too, and that didn’t help. I don’t know what’s wrong. I put the kids to bed at 7 even though they slept late this morning (no school today, unfortunately) and probably won’t fall asleep for a while.

I would really like to go to sleep right now. And I can hear them moving around and laughing in their room.