After hour #4 of LSAT I've developed a much dreaded headache. I found this article online which others might find a bit helpful: http://time.com/23952/21-natural-ways-to-prevent-and-treat-headaches/
Haha good to know you liked the quote! @VegMeg55 offers sage advice with what she says... if you stress time and not comprehension, you're in a losing situation.
I'm sorta having the same problem. I can almost always BR in the high 160s/low 170s, but fall almost 20 points when doing it timed. It might be a stress thing, but how do I fix it?