AP CHEMISTRY PLEASE RESPOND

So basically I have 26 days to review and memorize polyatomic ions, synthesis, decomposition, and all the other concepts. I have knowledge and background of general chem but I blanked out when read over the review. I do have an Chemistry AP Edition textbook by Nivaldo J.Tro which I will quickly review if I decide not to drop this class. Is AP Chem really that hard? I’m also taking AP Lang and APUS. I took APWH last year and got a 4 on the AP exam so I do know that AP is a rigorous course. Anyone with prior knowledge to this class please respond.