u/Aliximery

So the first biology exam in less than 5 days now and I feel so so done. I am in this very wierd position where in class I had excellent grades from testes and managed to get the top grade by the end of both DP1 and DP2. However, I did terrible on my paper 2 mock. I am not good with data based questions and the amount of content to memorize overwhelms me. I don't know what to do about this. I feel like everytime I revise omce I move to a different topic, the knowledge from the previous topic begins to slowly evaporate from my head. What should I do ?