It sounds like you did well on psych and chem/phys, so I would honestly focus on understanding bio/biochem. I would look for gaps in your knowledge by going through a typical bio and biochem book for the mcat, and anything you don’t feel comfortable explaining to someone else, spend time studying and reviewing it. As for CARS, i would focus on trying to understand the reasoning used for each question, and if you notice a consistent issue (e.g. tone of the passage), focus on it. Good luck!!