Hello, I'm 20 years old. My periods stopped 3 days back and I had sex with my boyfriend yesterday without using any kind of protection and it wasn't the first time we were doing it. During the intercourse I found that I'm bleeding. It was fresh blood without any clots. Though the bleeding has almost completely stopped now, but still I took an emergency pill just in case. I just wanna know the reason why did I bleed and if am I fine or not?