What Causes Bleeding And Pain After Genital Manipulation?

Hi, my boyfriend fingered me a week ago and i was in pain this doesnt normally occur when i am been fingered afta a while it started to feel nice but i have noticed i have been finding blood in my underwear since then i dont think its my period because i had that last week why am i still bleeding after a week? i am a virgin and never experienced bleeding after been fingered before