What is this???

Jaime
So about a week or so ago, my bf and I had unprotected sex. He pulled out in time, but I can't risk getting pregnant so I took the morning after pill. I read that side effects could include spotting, but this started Monday and I'm still bleeding today.... It's basically like a light period, but I just had my period on the 24-28. It's constant bleeding. Not like on and off. Does anyone know what this is? Or has this happened to anyone??