OK, MM , I just didn't want to butt in.
In no particular order, here are a few things that occurred to me while reading your post:
Pregnancy can make you hugely emotional. I know I can be overly sensitive when pg, and tears come really easily, especially at the begining of the pregnancy, when nothing seems real about it.
I had PND with my first child, but not with my second. I was terrified of developing it again, and as a result probably had a bit of AND instead, but the big thing is preparation. I discussed my worries with my GP and HV, got refered to the Peri-Natal Outreach team (who treated me previously) while I was still pg so that they could start looking after me before problems began, filled the freezer with cooked meals, talked with my dh about what it meant for both of us and how we could deal with it, got a cleaner. And, yes, I was knackered, yes, I cried a lot, but I did not develop PND - and that gave me a wonderful boost. Because being scared of the horror that is PND invites it, whereas the longer I knew I didn't have it, the less likely I was to develop it.
Is it possible for your dh to take off one evenign a week, or an hour every couple of nights? My dh is also a wonderful dad, but has had to be reminded many times that he is also a husband. We used to eat in front of the TV, but don't any more, and when the children were babies (they're 5 and nearly 3 now) would set ourselves the task of passing a few hours in each other's company without mentioning them. Making the effort to be with each other fully, was part of dealing with PND and of preventing it.
My dh doesn't really click with my parents - there's nothing bad between them, they just don't 'get' each other. Last year we visited my family abroad and dh told me that he really likes my aunt (mum's sister), and she has told me several times that she likes him. Recently, when my grandfather died, dh expressed concern for my aunt, who had been dgf's main carer for many years, and wanted to go and visit her if we could. I can tell you that hearing him say this made me love him all the more. I didn't feel in the least that my grief or love (for my aunt) were challenged, but that dh really was my partner in life.
I hope that this helps, and that if you want to talk about it any more that you will.