Hi CRice, sorry about your Dad and also that your DH has not been supportive. It’s so hard. 
I was on this thread at the beginning. It has been a difficult path to walk in terms of the grief and also in terms of my marriage. We are still not where I would like us to be.
It’s is very very early days for you so be kind to yourself and look after yourself.
My advice in terms of your DH? Keep talking, keep the channels of communication open. Don’t shy away from telling him how you are feeling, but also try not have too many expectations of what he will or won’t say in response or do in support.
Find another channel, if you can, for the rage, and other emotions, that come with a bereavement.
I think grieving people, through no fault of their own can be quite self centred, and quite right too, it’s horrible and no matter how much you fight it, you feel “why me” and “no one understands”. But therefore to others, this is hard to deal with, and they can feel like their needs are being overlooked. It’s just saddening that those closest to us can’t see that, for a time, our (the grieving person) needs are immense and emotions are intense.
As a sweeping generalisation, many men are inherently selfish and need their egos massaged. Which is shit. And there is debate as to whether they can really help this or not.
I don’t know what I’m really trying to say, because, like the grief itself, only you (and your DH) can work through this, and my experience is that is an utter slog. I am still hoping it will be worth it.
How long have you been together? Do you have DC?