To check your grades, select Settings, (on the left side of the page) Grades. 

Your instructor may take varying amounts of time to post grades. If your grade is not posted within a week of turning it in, then send a message asking for clarification.

The Gradebook should show you a percentage grade for individual "categories" and possibly a total course grade. Look at your syllabus to understand how each category is weighted. Generally work that is not completed or graded will not calculate into that percentage. However, if your grades look surprisingly low, contact the instructor to see if work not graded or completed is being averaged into your grade - it could make a BIG difference in your actual grade for the course.

Your instructor is always the first point of contact if you have any question about grades.