Post Partum Depression

I am almost one month post partum and i feel like I am experiencing post partum depression. My daughter crys & I feel like there's nothing I am doing that is right. I always check the basics is she hungry is she wet, does she have gas. Nothing seems to work, I rock her, walk her around, talk to her sing to her nothing works. I then start to cry and feel like I'm not a good mother because I can't figure out what's wrong with her. Often times I think she doesn't like me and maybe I'm just not a good mother. I've found myself crying day after day. All I want is to be the best mom I can be