At what point are you better off going to law school?

I'm a junior at HYP with a 4.0 GPA in a social science. In the spring, I didn't get into any banks that I liked, so I thought I'd try my hand at MBB; I had what I felt was a solid resume with good campus involvement, and I was admittedly overconfident. Unfortunately I got dinged at both Bs. I had a few buyside firms in the pipeline but those didn't pan out either. Should I just pack it up and start prepping for the LSAT? My thinking is to continue building pedigree rather than settling for a T2 firm. Any thoughts are appreciated.