There are 5 stages of grief. Denial Anger Bargaining Depression and Acceptance.
I know this because I bought a book. But I've yet to do more than flip through it. But I can tell you that I've got some denial and depression going on for sure. There is a part of me that can not believe Tom is really gone. I'll never get another good morning text from him or hear him call me babe or tell me I'm amazing and that he loves me. Surely this is just a really really bad dream.