hi vishal,
well u knw where u hav went wrong!!!! so better leave the whole world aside, n give ur best try to the exam this yr..... let noone hav faith in u, but never let urself lose faith in u....n then noone can stop u frm getting wat u want!!!! watever happened, its past.... dnt give it a thought ever again... jst concentrate on studies n come out with flying colours,... as far as other's faith is thr, u very well knw, that since u hav done mistakes, thats the reason u hav lost thr faith....now do ur best, n get thr faith back!!!
best of luck!!!