Hi, I Am A 17 Year Old Female And I

Hi, I am a 17 year old female and I had sex four days ago. It was a bit rough. After the first time that day I was a little sore but as we continued I got a painful burning tearing feeling. It was swollen and very red. Now days after, or still hurts and it looks as if there was tearing from penetration. I think there wasn't enough lubrication. But now on one side of labia closer to the entrance of my vagina, I have a single sore. It looks identical to a canker sore and is white. It's painful to urinate and hurts when I sit down on a flat surface.