(tmi maybe) bleeding after penetration?

Okay so me and my bf were fooling around and he started fingering me, and even though it got a little rough it didn't hurt. But I realized afterward that at some point I had started bleeding. I've bled in the past when men have been too rough but it was always just a little bit and it always hurt as it happened. But this time it was enough blood that there's a bloody handprint on my sheet (fml) and it seriously looked like period blood but to a lesser extent. Is that what they call spotting? My period is normally regular and it's not supposed to start for another week and a half, and I don't think I'm bleeding anymore so I'm pretty certain that it's NOT just my period starting early. 
Also, if i happened to be pregnant, would spotting occur only a week after the possible conception date? Or is it more likely that things just got too rough and I started bleeding because of it?