Bleeding and im not sure why

its a couple days before my period starts and i masturbated a bit too vigorously i guess and its the morning after and now im bleeding. Did i make my period come early or did i like, accidentally raw myself? It was spur of the moment and i used a hairbrush handle and now im scared i fucked up my insides. Im underage and cant really make doctors appointments by myself to make sure i didnt just break my vagina. Its pretty sensitive today, more than usual. What should i do?