What happens if you forget to divide your question 5 on language paper 1 into paragr?

For context, I'm normally an upper grade 9 student, but on language paper one I left my creative writing as a solid block of text- it was fully punctuated but had no line breaks. So basically I wrote one big paragraph. On the 2018 mark scheme it says you can only get 1-3 marks for content and organisation if you write no paragraphs. So I want to ask, have I just thrown away my grade 9? How many marks can I lose for this?

Hi how did you get on as I have done exactly the same!!! First mocks so not too stressed about it but just be interesting to see what you got