Year 13 revision Advice please

I am currently freaking out that I have left making revision material too late considering theres only this month, March and April left till A levels start which isn’t long. For context I do History, Business and Media so fairly content heavy/ essay based subjects. I managed to create all of my Business flashcards, now I am starting on media and I have not gotten round to make History ones. I do have pre-existing History Quizlet flashcards from other creators but I feel like I need to make my own so that the knowledge goes in. I am aiming for AAA, so if anyone has any advice on how to structure revision for the next 3 months, and wether Quizlet is useful for remembering lots of information please give me any advice. My plan is to finish all of my flashcards by the end of February, revise them religiously and then do loads of exam papers till May, would this be ok? Also - how much revision should I be doing per day in order to achieve A’s in my A levels. I would like to think that I do a fair amount however I still feel like I’m not going to be able to remember all 3 of A levels subject’s content in 3 months considering how much there is to cover.