Hi and welcome. Yes, especially if your church has a Celebrate Recovery, that is something you could both go to if she is willing. It's a great program.
I second what someone else said, doctors will write a script for benzos with no problem at all. If mixed they create crazy, and can be deadly. Just a caution.
Have you thought about just printing off what you wrote and letting her read it (maybe edit a touch)? It's obvious you care for her so much and want to help her through this. Family support is big.
I caution you, she is hiding alcohol. Do not let her drive the children, that is a path of disaster. Be careful. I have a child that same age, and the effects of having an alcoholic parent has done a number on her, that's for sure. She is in counseling and that helps, but it's a tough situation.
Glad you are here.