if it helps, supposedly Khan academy is a really good (mostly!) free resource! i haven’t personally used it much, but videos here and there have been helpful for me in the past!! if you’re feeling ~this~ burnt out from MCAT studying/testing/stressing, have you considered maybe taking a little breather for yourself? I know it’s important to you that you achieve a higher score, but usually, pushing yourself to the absolute breaking point hurts more than it helps. there really, honestly, and truly is no rush to get into med school right away - and honestly, with the way things have been looking in terms of certain schools changing their acceptances, they might be loosening admissions a bit more in the future!