I did it - for the first time in a month, I reached my self-imposed limit of three pages a day. I had to start from the beginning though, as I felt I had lost the overview and didn't know what to write. This is officially the start of the rewrite, and outlining the chapters to follow in the first three pages of my thesis helped me put everything neatly into place. I am not as far behind as I thought and the new deadline no longer looks impossible.