Hi Alex, have you thought about playing trumpet in a different genre? Jazz or Blues, its not all about exams and grades. Try and remember why you learned to play the trumpet in the first place, for fun. Learning can be experencial and not dependant on grades which are ultimately just bits of paper, some of the best players i know have never taken a graded exam in their entire lives so find a local group you like the sound of and join. Failing that you can aquire loads of Minus one backing Books and CD's in all sorts of styles from Classical to Ska.