My situation is a bit different but close enough that I feel I have something to add. After working for many years after completing a BS in Political Science I returned for an MBA a few years ago (accumulating the debt etc..that you would going to law school) and am now going to be starting a PhD in PS in the fall. I am not saying that the MBA is useless (some of my coursework actually helped me to define the course of study I plan to pursue in graduate school) but was a very expensive lesson.
What I am trying to say is that you should think about what is going to make you happy in the long run and pursue that course. I have worked in jobs I hated etc..for many years and am finally,in my late 30's, doing what I should have done 10-15 years ago.