vaginal discharge can be normal (some people produce more than others) especially during pregnancy. It can also be an infection, as sunnykewi suggests, and may benefit from antifungals or antibiotics. It's worth getting checked out with your doctor swabbing it and testing.
It could be a yeast infection, or a bacterial infection! but no matter what it is go to the doctor, some infections and stds can cause you to not have children!! Does your lower belly hurt? Your lower back? fever? If you havent gone yet go! If you are not sexually active I would be pretty sure its just yeast or bacteria!
it could be a few different things. you should see your doctor. it's not normal.