Hey Sarah, 

Are you going to take HSK 5 in a week? HSK 5 requires quite a high level of Mandarin. 

For example, you would need to able to identify 1300 characters. 

Here is the link: https://www.hsk.academy/en/hsk_5

If you need someone to practise with you in Mandarin, I am happy to help. 

Let me know if you have any questions. 

Just practice with the exam papers get familiar with their points. If you feel difficult in speaking, use the reading and comprehension materials, read out more.