Why do people act like nothing happened?

My baby was taken Home to God Sept 27, 2009. During that first week people were very supportive and kind. Now no one wants to talk about it or even acknowledge it. So is that all a grieving mother gets is one week? How is my loss any different than someone who losses a toddler or teenager? Do I not grieve the same did I not lose a precious child? Just because my child never got to walk or crawl this earth doesn't mean they weren't just as special. This is something that hurts me greatly. The way others act makes me feel like my baby was less valued than say a toddler or teenager would be valued. Just feeling a little misunderstood and brokenhearted.