Moms with 3+ kids

How do you do it?

I'm currently pregnant with baby number 3, and I love her, but I'm scared I won't love her as much as I do my DS and DD. I've been having a hard time "connecting" to this pregnancy... I've always wanted 3 kids, but this babe was a surprise as I was on birth control and didn't miss any. I was super excited to find out I was pregnant, even though she's an 'oopsie' but as I get further along I start getting more nervous. What if I don't bond to her like I did my other two? Am I crazy for feeling this way? Could it just be nerves from going from two to 3. I remember being nervous about going from 1 to 2, but I don't remember being this nervous about it...