Over sleeping

For a few days I was in a good sleep pattern. Going to sleep about 8.30PM and getting up about 5am, seeing the best of the day. But just lately I have been sleeping constantly. I know what's the matter. My driving licence is up for renewal on medical grounds and at the moment I cannot drive until latest I hear from my psychiatrist or Dvla. The psychiatrist to give me permission to drive or Dvla with my renewed licence.