If you are still experiencing issues accessing your exam timetable after the exam timetable for period 2 has been published it is likely that you'll need to sit your exam as an unregistered student.
 

How can I take my exam as an unregistered student?
To take your exam as an unregistered student, you will need to contact your department/faculty and inform them that your timetable is not showing up on Student Records.

Your department will then ensure that your exam will be available for you to access on the day of your assessment.