I thought that was a little strange if conception took place Dec. 31st. Three weeks and you're showing signs of being pregnant? I think Anna just liked to eat! If I'm hungry, I could do the same thing....only I wouldn't be that selfish or self-centered.
IMHO: The most noticeable feature of pregnancy seems to be the almost immediate drag on your system....being tired all the time. It lasts for about 3 months and was the worst part of being pregnant.