Glad you're feeling better.
I found out I was pregnant when I was 24, three weeks after my wedding. (Apparently the rhythm method works exactly the opposite from what I thought
.) I remember walking across the parking lot to the store to buy the pregnancy test, chanting "please no, please no, please no," under my breath.
I had horrible depression through my last trimester and really until DS was about two months old, when I slowly started getting better. (If I hadn't been such a stupid cow so stubborn, I would have asked for help long before and gotten better sooner.) When DS was four months old I was rocking him to sleep and I suddenly just started weeping. I realized how very, very much I loved him and it was all quite overwhelming! :)
And now ten feet away from me is a little boy, almost 4, building a "monster trap" out of string, his blanket, and the vacuum. :) He is my very life, and in my unbiased opinion, the sunniest little pal you could ever want. I don't know what we'd do without him!
You will be fine! Don't be afraid to ask for help if you need it, and don't feel like you have to "be" any certain way once you're a mom. You'll be just fine, I know it. :)