Depressd lyf

I feel lyk dyng .. its my 3rd attempt and till nw I didnt stdied well for final xams.. I thnk m nly nt capable 4 it . every tym I prepre bfre 2 mnth of xams and at last tym I gv up on myself that I wont b able to do.. what to do. I m really fell lyk ....18 days left fr grp2 bt my prep. is worst. .. and my parents are thnkn that I m stdyn and will clear. . bt I knw that I cnt do anythn.. god plz help me ... my future seems dark...