My wife cries everyday and I need advice

My wife, the love of my life, the happy person that I know is gone. She cries every day, with our newborn in her arms, at least twice a day. It started recently now that our newborn is 2 months old. She is the main earner of the family, at the top of her career; she got her promotion during her mat leave- shes a rockstar. We got help, a nanny, a house keeper… we divide tasks equally; she tells me she’s not exhausted and that she gets good help. But she is sad; she doesn’t want to be that career woman anymore. She feels constant guilt about having our sons taken care of by other people. She tells me she’s wants to stay home and when I suggest that she does so she tells me it’s not doable. She lost every will to be « the woman she used to be ». I don’t know what to do. I guess I need to feel like she’s not the only one. I’m probably not the best husband but I do my real best to spoil her in love and help in all tasks. She tells me help isn’t the issue. She keeps telling me it’s not post partum depression because it only started after our second was 2 months- she wasn’t depressed during those first two months. I’m sorry if my post makes no sense. I want her to be happy, to be the woman I know. She used to be my rock and now I’m lost because I have to be the strong one (plot twist- im not…)