So very sorry for your loss, AssignedFuckerAtBirth
My DH died suddenly, though the cause was known quickly.
we were one of those annoying couples who did everything together so even when my house was filled with people I still feel lonely as none of them are him. He was always the happy, joker in the family and I was the sensible strict one so there is now a massive hole that I dont know how to fill
This was us, too. 
Our DD was a young adult, and we were well-provided for, so I can't offer anything useful in that direction.
What you have to face is hard, and won't get easier any time soon so you must make sure you look after yourself, not least because you'll be better able to look after others if you feel supported. The common wisdom now is that early counselling is not as valuable as later. In ay case, you always have to be ready for it, which might take years.
Many 
Consider moving this thread to Bereavement, where longer-term support from MNers is available, as you don't drop off the first page so quickly as in Chat.