I am thinking twice about law school. To all the lawyers out there, can you tell me, is it worth it? $, time?

I thought I wanted to do Environmental Law but now I am thinking twice. Law school is really expensive and really demanding, not to add that I am only one person and don't really think I can make much of a difference. Lawyers are typically over-worked and misserable. Am I wrong? Is the time, money, heartache worth it?