EmmyCat - Welcome to SR, though I'm so sorry for what has brought you here. That is a lot to deal with at a young age.
I do hope you check out the Friends & Family forums - there is one for alcoholism, one for substance abuse but I find what loved ones go through is similar, no matter the substance.
I am glad you are taking care of Chloe and doing your best to keep her from all the drama.
Please remember that YOU need support, too. You need a safe place to talk about your feelings and be heard by people who understand.
SR is a great place for that, but you may also want to check out al-anon meetings.
Hugs and prayers,
Amy