Don't fret. I've been there many times. I once landed a job where I stuttered so bad that I almost just walked out of the interview. They hired me, to my surprise and I think they were shocked out how well I spoke on the job; I get really nervous during interviews. Keep moving forward if you don't get the job. You'll get one. Praying usually helps me. Stay positive. It could be worse - you could be confined to a wheelchair.