When you come down with a flu or cold or SOMETHING ... it doesn't really matter what, because they all suck ... and you lay around and do absolutely nothing for an entire day just KNOWING that when you wake up the following day you're going to feel so much better and have so much energy that you'll be able to accomplish what needed to be done for BOTH days ... and when you actually roll out of bed the next day you FEEL EVEN WORSE?
Yeah ... I hate it when that happens too.