What should i do? Run stay? What?

I think you need to state your case to your parents without getting to angry or shouting. You tried the best you could and if that is the case then you should be proud. Often people get good grades right through the year and then flunk out at exam time. It's caused by the stress of the unnatural environment that is created around exams and from too much pressure at home to do well. You can always resit or catch up at a college if you think you can do better but if you truly tried your best then hold your head high and be proud.