Congrats on the awesome loss! I'm gonna agree with, well, everything Willow said!
I firmly believe our bodies are much smarter than we give them credit for. We're internally wired to survive. Our bodies don't know we're not in the cave anymore - for all it knows you've lost weight because the hunting was poor this year and the harvest hasn't come in!
You're SO close to your goal weight that that little voice - ya know the one, the one that says "eat NOW!" - thinks that you're going to starve and your metabolism slows. As smart as our bodies are, they still don't realize there's a Burger King on every corner and no one's going to starve!
Hang in there and give yourself a huge pat on the back - you've accomplished a major thing! Keep up the work and it'll happen (heck, I've done it 2 1/2 times!)
(aka Punkin' on the Firecracker's thread)