I'm a bad mother

My 5week old is colic and has a hernia ... plus he's still has a thrush diaper rash ... what am I doing wrong as a mother? I feel horrible and my mil and my mother don't make it any better they complain that I'm not doing my job as a mother ... on top of that I'm suffering post partum depression.... how did I let this happen to my sweet baby .... I'm just done really done