How do BAD past scores come into play with admissions? I have a lingering feeling that this LSAT (September) will not mean much for my chances for a good law school. I am studying but the feeling of worry is there.

Little back story. The last time I took the test I had life hitting me pretty vigorously. I was taking an accelerated summer session in undergrad and two days before the test, I was in a car accident and got a concussion. Being as how the accident kind of knocked me out for a few seconds without knowing it or blacked out one, I didn't believe I had one. Walked into the test with sleep deprivation already from trying to keep up in class, but with an added concussion. I do not believe that was my best test ability because I was there in my seat, but could not focus. The whole time I had a headache or wanted to sleep. After the test day, being told I had a concussion, I decided to cancel the test (obviously) but with everything that happened, it slipped my mind. My own fault for not canceling it in time I know, but now with the number sticking I am worried it will stick in my admissions decision.