My wife has a postnatal depression

When our first child was born, my wife had a pastnatal depression. She has a really hard time. I see that and I try to support her to relief her as much as possible. But it doesn't change her depression.

Sometimes she is scared she will do something to our child. And sometimes I cannot even go to work. At work they show a lot of understanding, but I start to feel more and more alone in the relationship. Who has experience in this area as a partner?

My wife has medicines now and also psychological support, but I feel so helpless and lonely in this. I also notice that all the attentions goes to her and that people seem to think I will be fine. That's maybe also my own fault, because I find it hard to ask for help.

Who recognizes this and what has helped?