Remember that even though babies are vacant lumps for a long time, they are people, too. Very early on, your baby is already telling you how she needs to interact with the world. For instance, does your baby cry inconsolably at sudden noises? Even sudden noises that happen on a daily basis, like the dishwasher starting up or your own dog barking at passersby? It's tempting to say, "Get a grip, baby. This is your life." But, an aversion to noises can actually be sign that you are raising an introvert.
If so, congratulations! Introverts are highly intelligent, creative and empathetic people. (And, introvert babies are less social, so you won't feel compelled to sit through tiresome mommy groups, drinking weak tea and talking about how many wet diapers your kids produce each day. Yawn.) The more you can help your baby keep a low profile, the happier you both will be. Give her space. Let her explore the world at her own pace, preferably incognito.