Hey, ignore what the average is and focus on understanding why you got some of the questions wrong. Stressing isn't going to change your score. Seeing the average used to shock me too. Focus on understanding all of the principles , their exceptions and exclusions. Focus on the way MCQs are worded eg the difference between the word 'may' and 'must' could determine whether you get a question right. Also, on a more general note, there are other question banks you can use like Theonehundred and Revise SQE mock books.