Jendurham, I can't offer any advice on this as I haven't been in any comparable situation but I'm sure someone else has been and will help.
I've come back to this thread after a few days away. It's called moving on after bereavement; I cannot think I will ever do that but if it was called coping, well, that is what I have been trying to start to do, by immersing myself in all the admin. It has helped enormously. There has been, and is, so much to do, added to which I have had to deal with the last phase of the renovation of the house we'd bought and arrange to move to it. Too much to do, and what a blessing that has been. DD's had to go back to their own lives a few days after the funeral, leaving just poor DS here with me to help pick up the pieces. That was my lowest ebb. But last Sunday night, for the first time, I slept - in fact I slept the clock round. And woke to a beautiful, cold, clear morning ready to get going on it. It has been a life-saver. Just sorting through all the paperwork, getting it organised, cleared my head and gave me back a bit of confidence that I will get through this and will be able to cope alone. I offer this up in the hope that it may help someone else. I know we all must have different ways of getting through it, but just now this is working for me. The trouble is that. as Gally knows only too well, grief just sweeps over you unexpectedly. So many people have had to wait during a phone call while I have been literally unable to speak, tears pouring down my face - but all have been very patient. That is a wonderful poem, lucid.