Here is a list of the 7 stages of grief
Shock*
Denial
Anger
Bargaining
Depression
Testing*
Acceptance
The two asterick responses are additions to Elisabeth Kübler-Ross's original 5 stages in her book
On Death and Dying.
Here is a link to a website with them as well as links to her books.
https://grief.com/images/pdf/5%20Stages%20of%20Grief.pdf
Also if you listen to Dr. Sharnael's podcast with me, she speaks about grief's neurological engrained path (rut) is one of the strongest. It starts at 25:00.