Grammy,
I'm sorry for your pain. I know how you feel, I almost chose "tired" as part of my user name!
Your grandson is so lucky to have you, try to concentrate on his needs and yours.
And stop trying to figure out where you went wrong as a mother, I have spent hours doing the same thing, all it does is make us sad and tire us out some more! You certainly didn't cause your daughter's addiction, and I didn't cause my son's.
I find myself repeating that "I didn't cause it, I can't control it and I can't cure it" qoute a lot!
My best wishes to you, your daughter, and your whole family!:ghug3