Born again virgin?

Totally kidding...but really. I had a "dry spell" for about 4 months and I just had sex again yesterday. It was find, I was totally wet, we didn't do much foreplay but it felt fine. Come today I'm bleeding down there. Not supposed to start my period for another two weeks so I guess it's not impossible that it's just come early, but could it also be because it's been so long for me?? When I masturbate I never use fingers-- strictly clit. I don't think I hurt myself, and I don't think he scratched me or anything. Could it just be because I haven't had anything in there in awhile so the semi/rough sex irritated me? Any insight?