What Causes Pain And Burning Sensation In The Vagina After Intercourse?

Hello, so im 17 and im having a problem. My boyfriend and i have sex alot, atleast 4times a day each time we see eachother which is everyday. We have been together for 5months and we both have never cheated. Yestorday we had sex 4times and the last time we had it in the afternoon i hurt really bad.... i went to go pee and it stung and hurt so bad i almost cried... i wasnt bleeding at first but now today i have started bleeding, not alot like a period but a little bit and it stings to pee even a little bit and i have kind of an aching in my vagina and lower intestine area... whats wrong? Do i need to go to the hospitol?