A lot of people in my school couldn't manage to get to the last question. I barely managed to finish, but couldn't write as much as I wanted to, so i just made a conclusion pretty early. My answer for the 8 marker was half a page... I'm hoping for 4-5 marks at least. Also for the at 24 marker I wrote a page and a half... So you're not the only one.
If you are confident that you did well in the first 2 sections, then you'll be alright. There's also the other exam you did as well, which is 40 percent of your english lit GCSE so don't worry too much.