HELP ASAP!

Carolina

I have no had sex since two weeks before my last period (it was unprotected sex but I took plan b 2 hours after intercourse). My period is late by 6 days! I took a pregnancy test and it said negative. Today though, I had some pink discharge and clots! What should I do? I have been through a lot of stress and anxiety this month and I have not had sex. I also did not have any cramps.