Miscarriage or period?🤦🏽‍♀️

Okaay sooo I had unprotected sex with my boyfriend while I was ovulating... experienced all the pregnancy symptoms but two weeks later when I was in class I felt blood just rush out of my vagina. And it was a lot. It was heavy for like 3 days (heavier) than my usual period. The bleeding lasted for about 4-5 days and my period usually last 5-6. I'm not too sure what it was because now it's been almost 4 weeks since the bleeding and my next period is supposed to be in the next 7days. What should I do?