Pregnancy Depression

I thought being pregnant would be magical, getting to experience everything that goes along with pregnancy. I thought I would be excited, but the truth is, I'm not really excited at all. This was a planned pregnancy and I feel like a horrible person because I'm not more excited. I'm almost 25 weeks and we don't really have anything for the baby yet. Will I ever snap out of this? What is wrong with me? Has anyone else ever felt this way?