Hi Doctor, My Concern Is, I Have A Sexual Intercourse

hi doctor, my concern is, i have a sexual intercourse with my bf. but suddenly, while we’re having it, he saw a blood on my vigina, then we ended up here. while resting, the blood continue to flow, until now 2days ago, i’m still have bleeding, but i know i’m not on my period. this is not our first time of having sex. what it is doc?