I'm not one to be handing out advice as I wage my own battle against the demon BUT...I've been working in higher education most of my adult life and I can tell you with confidence that if you don't stop you WILL fail out of law school. Believe me, I'm not saying it is that easy, but knowing the stress you are going to face through the coming years of school it will be much easier if you do it sober.
Personally, I'm taking it one day at a time and the livin' ain't easy but it's better than being a slave to my addiction which ultimately, if not tended to, will steal everything and not even say it is sorry. That is why it is important that you realize what is happening NOW, be aware, and start fighting for your life.
The fact that you are here posting, as am I, shows that you are moving in the right direction. I wish you all the best in your studies.