Hi guys, needed some advice, Ive got 3 AS level exams coming up within the next 2-3 weeks (Biology, Chemistry and Maths) and then followed by 4 GCSE retake exams for Chemistry and the entire GCSE physics course (3 exams for OCR 21st Centure 2006 spec P1 to P7) however I only have revised for the A level exams and barely any for the GCSE ones (I got B's in both Chem and Physics and wanted to push this to an "A" however the pressure is unbelievable), any advice on methods of revision or shall I not retake these exams at all?