Generally the discharge can be due to hormonal changes. Which may be that you are pregnant. Since you are past your due date, a pregnancy test will work if you are. A really good test that is good at picking up hCG (which is a pregnancy hormone) is first response. A more accurate is a blood test via your doctors office. So as of now, you can test.
Best of luck, Hope this helps, If you need anything else please feel free to ask. If you found this helpful don’t forget to click the *Accept* button.