fingering

Okay so me and my boyfriend (I'm 16 he's 17)  took my VCard not that long ago so we where at my house and my mom was out so we where fucking in my room then when we where done we came out to sit and watch movies he had to go home when my mom got home so when we were watching movies he started fingering me and he was going really rough and I was okay with it the he pulled his fingers out and there was blood on his fingers he seemed really scared at first but I kept telling him it didn't hurt that that everything was fine  it's been a couple hours since he left and I'm still bleeding I didn't want to tell him because he will think he hurt me but i don't even really know what is happening I don't get my period for another 17 days so I don't know why I'm bleeding please help