If you were consistently scoring well across a range of tests, I doubt that the recent drop can be attributed to a lack of skill or knowledge. As someone else said, burnout is a very real possibility. I would not stress out about it. Do some drills, practice self care, and make sure you have a good breakfast the day of the exam (protein + complex carbs) so your brain will have the energy it needs to get through the exam. I am planning on scrambled eggs, multigrain toast, smoked salmon, berries, and coffee btw.

Got this one!

Got this one right!!!

This one was very easy for me and I knew it was D almost immediately. I go and check and it's rated as 5/5 difficulty, yet the last question which was 4/5 difficulty took me a longer time to answer and I got it wrong. Does this mean I am improving or not?