I am sorry to hear this happened to you....
When my first husband was killed, I didn't touch the quilts I was working on at the time of his accident for a long time. It was almost as if they held too many painful memories for me, as I had started them and worked on them when he was alive.
What worked for me was to start a whole new project from scratch. It took me awhile to get through that first new project, but it did get me back on track with my quilting. I did eventually get to the UFO's I had started, all except the one I was working on that night when I got the call.
Give it time, start with a small project from start to finish.... I hope you can get back to quilting, I know it gave me comfort and was an avenue to work through my grief. :)