submit a really good piece of work that can get an 'a' and sometimes we think we have produced work that is deserving of a high grade only to get a mere 'c'. the pressure may also be on to hand in a high quality piece of work to get an overall good grade in the course.
all of the above 5 reasons would indicate that it would be a good idea to get some additional help to reduce your stress and pressure. sometimes even when you plan your time to get your work done within reasonable time others things are happening in your life that cause you to get behind 