Re: Lost weight!
Did you use your home scale, or a professional baby scale? Home scales can be off significantly from weigh-in to weigh-in. A difference of .5 oz wouldn't worry me at all if it was just a home scale.
When to worry: when diaper output drops below normal, when baby does not seem satisfied after nursing, when baby seems sick.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"