Brain-strain is absolutely the worst, isn’t it? I spent possibly a half hour too long concentrating on the dang book, and now I have a wizzo of a headache. All of which argues that I should get some sleep, let the old grey matter relax, and so forth.
Still: got up to Chapter 14 of GHOSTS ON AN ALIEN WIND. About halfway done, and after that I can block out what still needs to be written. Huzzah!
Given the subject material, you might consider a SAN-check. Many a writer has been infected by their own material.
But don’t check it too close. The mad-writing is the good stuff.