Sad mad

Wendy
It makes me so mad sad and all kinds of emotions me and my fiance have been trying to get pregnant for a year now and nothing. I had a miscarriage about 7months ago and havent been able to get pregnant since. I have a 9yr old son but my fiance has no kids and we both want to have kids together. How do we keep praying and hoping we get pregnant every month, and every month my aunt flow comes we are disappointed. How do you keep hope and faith.