Hello dear student,

I would advise you to make a proper time table as exams are near but still there is a lot of time. You can take one subject which you feel is hard you can study it like a hour and then take break and prepare for another subject which you feel is lighter and you know about it already . Likewise we can prepare for your exams. But I would like to suggest you to kindly check previous year papers that come in board pictures that will help you to get an idea what kind of questions can be asked per subject in boards. I am solving previous year papers will also help you to get some confidence. While practicing is a great way to achieve good marks. So solve as many as questions you can of a topic of chapter which you feel you are not good at. I hope this is helpful to you

Best wishes