I am answering this May AS exam and did pure maths yesterday. I ran out of space in exam paper booklet and asked for extra answer sheet. There was still half an hour left of the exam time. The centre did not give me saying Cambridge won't check my paper and so I could not answer the rest of my exam nicely, probably scoring so much lower. What can I do? I was predicted an A* and A but now most probably will be stuck with a B...