CUT IN VAG. HELP.

Okay so I was just having sex with my boyfriend and we were toward the end and he started fingering me/eating me out when all of the sudden I felt this really sharp pinch and I screamed because it hurt really bad and he stopped and freaked out because he doesn't like it when he hurts me and so we stopped and I went home and now I'm in the bathroom and there's blood in my underwear but it's not from my period, there's this big cut in my clit and it's bleeding and I'm not sure what to do. There's enough blood that it's clotting, but it's not like I can put a bandaid on it and call it a day. It really hurts and it stung bad when I peed. Is there anything I can do for it? My mom doesn't know that I'm sexually active so I can't really ask her. I was just wondering if anyone has ever experienced a similar thing or if anyone would have some advice for me.