Depending on how late
your period is, I would take a pregnancy test, or give it another few days to see if
your period comes. But as I said, if you did have unprotected sex and are having this discharge, it could be just yeast, but it's best to get checked out to ensure it's not something more. You can go to a planned parenthood for free or find free or low-income clinics online, if insurance is a problem.