What's wrong with me

It's been 9 months so far. And month by month I get so excited of the possibility of having our baby. But every month do far huge defeat. Why would I thought I could give my family the gift of hood news on Christmas day? Why the big let down? I'm doing everything right and still no positive. If I did get pregnant on our first try my baby would have been here or on him/her way. Lord please take the wheel on this one! 14 or 15 dpo