so according to me what u should do is that u should
make a proper study plan, according to your study hours you should devote time to both the subjects ( choose the tough on first) . For eg. if u study 5 hours a day you should give first 2 hours to one subject, have 1 hour gap refresh yourself and then give the next 2 hours to another subject.
do not panic, and follow these every day
atleast complete 2 chapters per subject in a day
nd m sure u'll b able to finish the whole revision in a few days.