People, help me? blood, blood, blood!! :(?

I got blood comin from my girl region, wat is goin on? I told my big brother and he laf at me. I'm sad. I got no mama or papa to talk too. I crying evrynight. Wat shuld I do? I think I am sick? Dis happen to me 5 tymes now..startin on decenber. I stop skool becase of dis blood.