I'd definitely write about it in your essay. As long as you can do well on your LSAT and you can write good essays I don't think it should affect you that much, if at all.
Still kicking myself after narrowing the last question of the last logic game down to two answers with 30 seconds left, seeing I had both answers in my outlines, had to chart out the possibilities I hadn't thought of, and as the section time expire…
I took it a few days before my test and I think that worked pretty well. You shouldn't stress at all about it. I reviewed strategies day of and it went great. You need to have it reviewed and approved before you are able to see your LSAT Test scores…