I learned early in this journey that grief does not follow a linear, precise progression. There have been times when I would experience several of the famous “stages of grief” in one week. While I agree that most people go through stages, I disagree that these stages occur in any particular order. I also believe that you never truly finish grieving. Instead, you learn to weave it into the fabric of your life.
A Mother's Grief and Learning to Live Again 
So very true. It takes a long time to weave a loss into the fabric of life.
http://onewomansperspective02.wordpress.com/2012/06/17/my-life-is-but-a-weaving/
I have experienced all the phases of grief and never in a particular order but one that I have almost as a constant companion is anger; anger at God, at the world, at the circumstances….but NEVER, ever at my son. I suppose it is one of the phases that will never be resolved in this life.