It is a good idea to plan your revision, and to stick at least roughly to a timetable. Make full use of the vacations, not just Easter, but Christmas too. When revising your courses, it is a good idea to summarise your lecture notes, and work through problems again. Focus in on areas you are having difficulty with, and talk to fellow students and academic staff about these. A particularly useful resource will be the recent exam papers, and it is perhaps a good idea to leave them until exam revision rather than to attempt them earlier in the session.
Proofs are enormously difficult to memorise.
The only way successfully to be able to handle bookwork is to understand the definitions and proofs, and not simply to memorise them. You will, in any case, need to understand the key ideas and concepts in order to handle the bulk of the exam questions, which will be testing that you can solve unseen problems. Try to relax and take control of your exam. The exam you sit will quite probably contain problems that are unlike others you have seen before, though there will usually also be some less surprising questions. This is part of the nature of exams, and you should not let yourself panic about it.