TTD,
Welcome to SR. I agree with honeypig, you don't really need to have a label on someone who has issues with alcohol. Three years of watching a loved one self destruct is horrible.
While she is in her binge, what are you doing? Do you stick around and engage with her while she is drinking? Is there any place that you can hide out for a couple days while this passes? Not engaging with her is the only thing that you can do to protect yourself at the moment.
The problem is, is that alcoholism is progressive, it only gets worse. Us codies, tolerate their behavior and believe them when they say it will never happen again. There is help out there for you my friend, keep reading around this forum and you will learn a ton. Reach out to a therapist or hit an open aa or alanon meeting. Hugs my friend, we all understand!!