not another one

Just been on facebook, another school friend announces her pregnancy.......she's 3 months away from welcoming her baby to this World, and i'm still waiting. I'm getting anxious now, its all I wanted for Christmas....I've been a good girl, why haven't I been given my baby, why do I have to wait so long? I want a baby bump, an expression of love between my husband and I. I feel awful every month, when am I finally going to be able to say, 'we did it, we've got a baby on the way'. Feel like a failure as a wife, I can't produce, I can't give him what other woman can, he deserves more. If its a family he wants, then maybe he should find someone fertile. Whats the poing of this life if I can't even produce an offspring, am I a 'half woman'?