Make sure you are getting in touch with every possible contact and are networking at every opportunity. Get yourself out there everywhere and network like crazy. Just about every day and night of the week there are bar association events where you should be trying to meet potential employers. I want you to start injecting some confidence into your search. I know that this is easier said than done when you are starting to feel so defeated, but you must try.
Nothing is a bigger turnoff in an interview than a candidate who appears to be desperate.
Please do not give up. Your academics and credentials would tell me that you are very employable. You just need to fine-tune your interviewing skills, continue to network and send out your resume.