I had my period march 1-4 and had unprotected sex on march 5th. Everything was regular tntil march 12. I woke up n went to da restroom and bled like if I was on period. What could I be? Am I pregnant?

If you had sex, you could be pregnant. It is too early to tell with a test. We don't know what else it could be as we know nothing about you or your medical history, and have not seen you as a patient. You next step would be to wait until you miss a period and take a pregnancy test. If the bleeding continues, and is abnormal, see a doctor.