Why do I feel so crummy?!

We just got back from our final ultrasound to measure the baby and our final doctors' visit. We determined an induction date which will be March 10th, and so far, everything looks like it's progressing well. My baby is healthy, he is a heavy boy, my fluid is low enough to induce, and we're all ready for the arrival of our little miracle. Then WHY on Earth do I feel so depressed? It's like I have a cloud over my head that I can't shake and for no particular reason! I just feel like crying and being left alone. There is absolutely no reason for this! Anyone else feel like this? Maybe hormones got me tied?