Anger is a common reaction to a death. There's five stages of grief, I think it's Shock, Denial, Bargining, Anger and finally Acceptance. Everyone processes at different speeds, forms. Sudden death is tough. for me, it was up and down, back and forth. I think folks expect us to get "back to normal" much quicker than we can. honestly, for me the second year was very hard.
I was seeing a psychiatrist but I really needed someone who specialized in bereavement. I found a one through a Life Transitions program at a local hospital. She worked with terminal illnesses and deaths. She gave me some books, some assignments, a safe place to vent my anger at my husband. She really helped me resolve my feelings and made it possible for me to let go and adjust.
I hope this helps. I know how hard it is for everyone involved.
Love from Lenina