I might have a little perspective on this - graduated from law school in 2010, been a lawyer for 6 years now. I was sober going into law school, that lasted about 4 months. Heavy drinking at the end of law school, then 3-4 years on the job, drinking got very bad. Law is a stressful environment, there is a lot of nastiness, anger, arguing, etc. Stress at work has been a huge trigger for me - not that it's an excuse, and there are plenty of lawyers who either aren't alcoholics or are in recovery. But if you feel like you have had a sea change in your feelings and personality, you may be better suited for something else. A lot of people stick with law school even after they realize they don't want to be lawyers, due to sunken costs. Most regret that they didn't just cut their losses. On the other hand, if you stick with law school, you don't have to be a private attorney who works long and stressful hours. There are a lot of lawyers in non-traditional legal jobs.
I admire the fact that you are critically thinking about it