Whats the opposite of a fever?

I'm running an underfever of 97.4. I am achy and cold all over and my nose has not stopped running since I cleaned my room like a madwoman yesterday. My throat hurts from the postnasal drip. Orange juice would be yummy if only it didn't hurt so much going down. Sleeping would be fun if the room would stop pulsing when I lie down.

Maybe I should check the temperature again and see if there was a mistake. Hmm... yep. 97.7. That's still an underfever. What do you call it anyway?