First tell me are you doing any other papers this December 2014?
At this stage, what you SHOULDN’T do is read any study text. Just go straight to the OT notes for P3, read them, and bang on your revision kit. Do a long case study (50 marks) each weekend till the exam and aim to do a small questions (25 marks) every day. Like that you will have plenty of time to prepare. However, before doing this makes sure you have gone through the entire course notes for open tuition and read them thoroughly