My sincerest condolonces on your loss.
I am assuming your DH died recently. Mine did too, and like yours, my sleep pattern was shot to pieces, as it indeed had been during his last illness.
Here is what I found helpful.
For the first three-four weeks I went to bed at nine p.m. which for a night-owl like me is the middle of the afternoon normally! But it was when I felt completely exhausted. I slept for three or four hours then woke.
If I couldn't fall asleep again, I got up, popped on some warm clothes (this was in November of this year) went downstairs and did something practical. For the first days, tidying up so the house was presentable for the funeral. Afterwards I sorted through paper for Probate, as I assumed that the thought of this was contributing to my sleeplessness.
When I began to feel tired again, I went back to bed and stayed there, whether I could sleep or not, being convinced that just lying there resting did nearly as much good as sleeping.
This may not work for you, but if you haven't tried it, it might do some good.
Another point, and I hope you don't find it too intrusive or hurtful: are you still sleeping in the bed you and your husband shared?
I am, having considered soberly whether I wanted to or not, and decided that I simply am not ready, and probably never will be to dispose of "our" bed. I have tried to accustom myself to lying in the middle of it, but that hasn't worked. I waken up on "my" side of it all the same.
To me, DH, isn't as far away if I still sleep in our bed, but you may be the opposite and if so - go out and buy yourself a new bed and consider whether you want to use another room as your bedroom as well.
I cut off my long hair that DH had always loved on the evening of the day we buried him, and am now, for the first time since I was seven, I am 72 now, short-haired. It was a deliberate symbolic act to demonstrate to myself that a new chapter of my life had begun and that I have to move forward.
Perhaps you need to consider finding a similar forward-looking symbolic act? But only if you feel it would be liberating.
My husband died on November 1 and was buried on the 8th. It has been a long hard month, as you will know, only too well.
I am still tired by early evening, although my bed-time is moving slightly later, and I am sleeping a bit better, especially after sending Probate all the documents required.
I hope some of my suggestions help. If you need to "talk" send me a private message any time you like. I have found other widows both on Gransnet and amongst friends in the world rather than in cyberspace extremelly helpful, as they know exactly what we are going through, so I hope I can help others, as I am being helped.