Was this consistent with your
GMATprep scores? I'm curious because if that's not the case then you probably will do better once you stop freaking yourself out, but if it is then a different study plan may be in order before you retake it again. Personally, I'm having a problem with consistency, but I'm working on it.
I was a little baffled by piero's post, but you don't necessarily need a 700 for top schools, but they seem to almost require 650+ unless you're really unique (in a business sense, not a columbian woman sense!).
Good luck!