My heart goes out to you and your new baby!!! Please, please, please don't abort your child!!! Think back to when you were pregnant with your daughter. Even when you were having awful times and struggling with all the decisions and pressure, you could feel the the precious life inside of you. Your daughter was a part of you just like your new baby is now. His or her heart has been beating since before you knew you were pregnant. He or she already has everything he or she needs to become a fully functioning human being!!! Cherish the life inside of you, it deserves to live! Even if you and your fiance can't rightfully choose to keep the baby, please give your child the gift of life! There are so many parents who would love your baby as their own.
Just as a side note, if you haven't already, try to find a TeenMOPS (mothers of preschoolers) group in your area. The program has been a tremendous help and encouragement to several of my friends. You'll be so glad you did.
I'm praying for you and your baby!!!