This baby was a surprise as well. I just had a baby Feb '11 and he was only 9 months when I found out I was pregnant. I had a hard time coming to terms with the idea of having another baby so soon and my baby having to grow up a bit quicker. My husband was really excited so his happiness made it easier for me to adjust and I try to focus on the positive aspects of having two kids so close in age. We had been talking about the idea of having another one just a bit later. I feel so much better about having another baby now and I feel like our family will be complete; a feeling I didn't have when I was pregnant with Zack. I kept thinking this would be my last (last time) but it didn't feel as final as it does now.
My first son was also a surprise, I was just out of high school. I knew I didn't want an abortion and I did want to have the baby. I didn't like children prior to having my son but something just changes in you when you hold your baby for the first time. I did have moments when he was first born that I would hold him and think "what am I suppose to do with you?", but I loved him right from the start and you learn.
Please feel free to express your feelings. I know there are plenty of people on here who won't judge you and give you the support you need.