Pregnancy and depression.

So, ever since I found out I've been in this real funk. I can't leave my bed most of the time. I always feel so sluggish and tired. I can't seem to finish small house tasks. I'm scared of having this baby. My s/o other is so excited which only makes it harder for me to talk about. I don't want him to feel what I feel. I'm afraid that even after my baby is born I'll still be stuck in this and won't be able to take care of them like I'm supposed to, which only makes me sink further. I see other mothers doing it and I just know it's not me. How do I get out of this? Is there anyone going through this as well?