stages of grief

How many stages of grief are there? I can't remember, but I seem to have been stuck on the anger one for about 22 years. I never really stopped to think about how my depression has effected my mom. It isn't her fault, but sometimes I wonder if she doesn't think it partly is. That makes me sad. I didn't mean to hurt her with this. I didn't mean to hurt anyone, but I guess I have. How did I get onto this. I was just meaning to say a sentence about anger.