This can't be right, can it??

So today is the dreaded Friday the 13th. I am due December 13. By my calculations, I still have 6 months left to go with this pregnancy. Can that possibly be right? I feel like I've been pregnant for 10 years. How can I possibly have HALF A YEAR left?!?! HALF A YEAR PEOPLE! Think about that - it is a looooong time.