Grieving a sudden death is often different from an expected death, because there was no preparation, no chance to process the situation beforehand. All of the emotions of grief arrive very suddenly as well. Sudden death also poses challenges to our sense of control, it reminds us that our world is unstable and that we are never fully in command.
Later, reality will present itself in small doses as we process the loss. We have to learn how to do things the deceased once did for us and that we now must do for ourselves. We may need help learning to manage the house, take care of the children, and locating a job.
Avoiding excessive use of alcohol or sedatives is wise. Eating well and taking good physical care of yourself is also important. Seek help from friends or professionals when you need to talk or when you need advice on matters that cause you concern.