Dreams about preparing for an exam often reflect your feelings about challenges or assessments in your waking life. In your dream, the praise from your professor suggests that you have a level of confidence in your abilities and knowledge, indicating that you feel well-prepared or capable in many areas.

The fact that you acknowledge needing to revise one topic more is a clear indication of your awareness of your strengths and weaknesses. It may symbolize a desire for improvement and a proactive approach to your challenges. The three days you mention could represent a sense of urgency and the importance you place on fully understanding the material before the exam.

Overall, this dream seems to convey a positive message about your potential for success, as long as you focus on the areas where you feel less confident. It suggests that with the right preparation and effort, you can achieve a favorable result. Trust in your abilities and use the time you have wisely to address the topic you find challenging. Good luck!