Most people report that their grief comes and goes unpredictably, almost like a roller coaster. But not everyone reports that. Some people feel worse early on, while others find that their most difficult times come months or sometimes even years afterwards. There are many possible feelings one might have. Sadness, anxiety, anger, guilt, tiredness, helplessness, and loneliness are often reported.
Some people feel shame, others feel relief.
People in grief sometimes don't sleep well, or they sleep too much. All of these feelings and behaviors are normal during grief. That's one of the most normal feelings of all. In a crazy period it can make perfect sense to act a little crazy oneself. Many people, perhaps the majority, wonder if this is happening to them at one time or another in their grieving process.