I felt very much as you do when I was pregnant, ER. My pregnancy was unplanned and I spent most of it obsessing about the increasingly imminent labour and birth rather than on what would happen afterwards: I didn't have any maternal feelings either beyond a sort of protectiveness towards my unborn baby. I did try to imagine what it would be like to be a mum but I had nothing to compare it to; I couldn't quite believe it was going to happen so there was a sense of unreality to it all.
My advice would be not to berate yourself for how you're feeling. Your baby's arrival will knock you completely for six, there's no way of emotionally preparing yourself for it so don't try - just concentrate on the practicals, like you are doing. Although your baby is demonstrably real, kicking and wriggling inside you, you haven't met him/her yet, you have a lot of getting to know each other to do, so it's no wonder you don't have any maternal feelings just now.
You might find the first couple of weeks after the birth very difficult - I did, and posted a thread in Parenting to that effect, and got brilliant advice. I can find you a link if you'd like to read it. It was only then that the reality of motherhood really sunk in for me, and I found it a rather strange and anxious time. I don't know if I immediately bonded with my daughter at birth (lots of women don't) - I thought she was beautiful, and I was a little bit in awe of her, but I didn't feel like her mother. Later, when we brought her home, I felt totally overwhelmed by the responsibility of looking after her and terrified I'd cock it up. The feed/sleep/feed/sleep routine of every day felt a bit oppressive at first, and I remember the first evening she really bawled I bawled too, along with her!
Gradually I felt more settled though, and now my daughter is 6 weeks old (lol - check me, voice of experience) I can honestly say I feel much happier. It helps enormously that in the last couple of weeks she has become much more alert, and has started to smile, gurgle, coo, and generally make it known that there is a lively, burgeoning intelligence and personality behind those gorgeous blue-grey eyes. Since she was born, I can't count the number of times people have instructed me to make the most of these early weeks, and how special they are - it's only now that I understand what they mean.