Just hope that your string doesn't come off ... then it's fine
... or hope that the teacher marking it will make an effort to
compile your scripts...
Maybe you can also check with the CPE/PE to see they can help
you annotate or make a note to Cambridge that such a thing happened
and give you some excess arrangements
anyway, don't worry too much as you can't do much to alter it
and focus on the rest of the papers.
But make sure this does not happen again for the rest of your
papers, I usually write my name and index before answering on a new
piece of paper.