Hi, okay so i am an 18 year old female. i noticed that it started to burn when i urinate, and it hurts down there - uncomfortable to sit down etc.. i checked in a mirror and i saw some canker sore looking things inside the lips of my vagina two days ago. ive only had sex twice in my life and i realized i made a mistake (due to religous reasons) so i quit. (that was over two months ago.) my partner does not have any stds that i know of and i have been researhcing the internet but cant figure it out. but somehow im still very worried. please help me.