Christie's baby is in the third and final stage of gestation. the major characteristic of this fetal stage of development is the:

On the third trimester of about 27-40 weeks gestation, fetuses can be born and survive outside the womb. Babies are already formed and organs are functioning. Thus, major fetal development at this stage is the storage of fat on the body and gaining weight as preparation for its birth.

Probably because you wake up early. even when i get a good nights sleep i still feel tired if i wake up early. or maybe you just need coffee.