My 7 week old ds still wakes up roughly every 2-3 hrs for a feed. He does not seem to be engaging with me or DH. So far I have only seen one smile from him (which was lovely & made my heart melt) and very little eye contact. My only experience of babies was with DD who is now 5, and totally different from DS. Is his behaviour usual for a 7 week old or should I worry about the lack of response from him?