Prenatal Depression?

My husband and I wanted this, we planned for it. What I didn't plan for was how I was going to feel physically, mentally, emotionally. I have been so sick, barley able to work which is causing some financial difficulties and is stressing me out. I started reading some articles on prenatal depression and easily related. I don't want to do anything, I don't want to get out of bed although I'm having trouble sleeping, I feel worthless, and other then when my husband is home I feel really, really alone. Once it gets dark outside, I find every excuse to go to bed as early as possible, not just because I'm tired, but because it's easier then being awake. I haven't talked to anyone about this out of fear of judgement, but I'm not choosing to feel this way. I worry about everything, and now my thoughts of "I'll be happy once the baby is here" has turned into a question, "will I be happy?" I know many women struggle with morning sickness but it has completely taken over my life starting at 3 weeks, and now 12 weeks into it, I still feel terrible. All I keep thinking is how in the world am I going to deal with this for 6 more months? I realize there are so many women out there who can't concieve, and I feel terrible complaining about something they so badly want, but it's an uncontrollable feeling.