[My Dreams killed me]

Let's get straight to the point.
My grandma's about to die
My mother is depressed and I'm afraid she's going to start drinking again, which would ruin well, EVERYTHING, that either me or my mother has achieved in the last 5 years. I'm worried sick about my mums cause I'm just afraid that my grandma's death is going to push her to do something stupid. Can anyone give me advice how to confort her, cause so far any efforts my me have either failed or have been ignored.

Oh and on a competly separate note, is 22 a good ACT score, I have no idea, and I'm trying to figure out whether or not I should retake it

thanks all as usual,
Dreams.