I just had oral and stupidly unprotected sex with my boyfriend and during it i felt a slight pain for a second and then it was over but after we had finished my vagina felt really unusual and sore so when i got home i checked it out and my left labia minora has swollen up like a balloon to the point it sticks out. it's very uncomfortable and it really hurts, sort of like a burning sensation. it's also very tender and it feels like it has been strangled. I'm very worried, please help.