You are NOT a failure, I can't stress that enough. I mean, I know it feels like it right now you can't help that, but you are so incredibly NOT a failure. If nothing else, because the friends I have who went to law school - they had to take the LSATs 2-3 times and they're now all published lawyers working for the government, so you're very much not alone :). And that aside, standardized tests are an indication of nothing worthwhile, let alone your ability to be a good lawyer, or to be amazing at anything else, or intelligence for that matter.

You will retake, you will kick ass - and even if you don't, you're still not a failure. The system, it just likes to screw with you and make you feel that way.