Need Help!! STRESSING OUT

Resitting 6 exams, while taking 6 A2 exams will be incredibly, incredibly tough indeed. It just depends on how hard you are willing to work, but even then that's quite a tall ask. Have you considered retaking the year entirely? Taking 6 extra exams may do more damage than good!

that's where i'm stuck I have done many papers for maths and never have i got below a C . This is really frustrating, as i don't know where i went wrong. i don't want to retake the year entirely If i want to do As during A2 i'll have 13 exams

Sleep on it. Wake up again tomorrow and re-assess the situation. No-one at all should be making decisions like these today. Then maybe go and seek assistance from your school? They'll have seen this before and will offer you some advice.