Just now reading this shocking news. I'm so sorry for you Chris, and for Charlie Jacob. Neither of you deserves 1/10th of what you're dealing with. Maybe it isn't post partum depression, maybe it is. It certainly sounds like the shock of the responsibility is too much for McK to handle right now, and regardless of any diagnosis, counseling would be great for her, or for both of you. Easier said than done, though, I'm afraid.
I second the questions about how much practical help you are getting--time off for paternal care, or family help, or just supportive listeners.
I think I speak for us all when I say you can and should lean on us now. You're such a positive and strong person, I've always admired that about you. And yet nobody would blame you now for needing to vent--a lot. So talk away, in chat, or here, b/c you know we care, and want to do anything we can for a brokie, and a friend, in need.
My thoughts and prayers are with you.
Jenny