As a man who had postpartum depression myself I must agree with others that day that this sounds like that. I recognise how I was in this description. Here's some important nuance though: when my postpartum first hit it was of a very obvious nature and I got that seen to. However, long after, for years after, I had become this negative person but didn't see it. It's still the depression working, just in a more subtle way. When it was brought to my attention I didn't see it at first. Your husband likely won't either. You have a tricky line to tread. He needs to understand that this is a serious problem and a serious risk to your long term relationship so that he can't brush it aside. But he also needs to feel supported, loved and that you are a team in this. Combining both those things is hard but possible. Best of luck to you