If you have already well prepared with the concepts, the last two months should be entirely spent by practising mock tests, previous papers, etc.,

If you are not well prepared you can make a weekly schedule and get through with all the formulae and major concepts based on weightage wise and subject wise and simultaneously practising tests.

Firstly study the topics that you feel are easier, then go for remaining. Go through ncert textbooks first and then any reference books. Try fewer problems in each chapter that have unique individual models. If you get stuck don't see the answer, you have to try to solve on your own

Also, don't concentrate much on hard questions practise all the easy questions first, because most of the questions in the paper are easy. Don't concentrate on derivations much and rather have a quick glance over them. Plan your day giving equal importance to all the subjects and don't panic, u can still do it.Be confident and seek guidance from your teachers.

All the best.