This is great news! Sounds like delayed carb flu. That happened to me too -- you're great for a week, and then it hits. (Has anyone else had delayed carb flu?)
I'm guessing that your body finally ran out of spare sugar and hasn't quite figured out how to burn fat yet. So your body is clamoring for carbs/sugar. Don't give in, or you'll start over from square 1.
Eat some eggs drenched in butter, then wait an hour. If you're still ravenous, try a starchy veg, or, if you have to, some berries. You have another 8-10 days of this to get through. It will get better.
5'0" female, 42 years old.
Started Primal October 31, 2011, at a skinny fat 111.5 lbs.
Current weight: 101.5. lbs and holding steady. Spring yardwork here we come!
Co-worker 1: Needs to lose ~50. Now he wants to start Mayo Clinic Diet. Yeesh. Give it up, man.
Co-worker 2: Needed to lose ~55. Lost 20 from stress. Started Primal in Sept, lost 20 more, but gained 10 back on a carb spree. We're working on it.