Have you been able to have some sort of memorial to your baby? Even its just with your husband and you, or those people in your life who are most supportive? At some special place? or whatever might be meaningful to you? For me it helps to make it more understandable if there is something solid to touch, like a tree.
There is a really nice website on the topic of miscarriage and infant loss. It will make you cry your eyes out, but it looks like it has some wonderful information and support:
http://www.empty-cradles.com/
Take care. emmy