Certifications are not the end all be all. I have worked with people who have not had any certifications who could do circles around those who had several, myself included. A certification does look good on paper, though, and will help getting a job. That said, I would say get right back into it with the CCNA. I know it's a pain in the butt, but so what? Just get the first, then go to the second, and on and on and on. I hope those who read this can take your lesson to heart and give themselves and out if they fail. I, for one, always wait to the last minute to re-certify, and I have come close to replicating what happened to you, so maybe not feel too bad because there are a lot of people who do the same and lose their progress.
Best of luck and be sure to retest when you can.
