In a funk..

I'm just in a serious funk in life. I just want a baby to complete my life. I've always wanted to be a mom. I have three step kids but none of my own. I've just felt beat down. My step daughter has always had issues with me no matter what I do. She's 10. I've been around three years. My husband posted something about staying with your baby mommas and try and make things work as hard as you can. How is that statement suppose to make me feel? I'm just tired and feel beat down. I've been depressed and know I have been gaining serious weight from stress. Why can everyone else get pregnant with ease without trying? It's just not fair... :-/