had unprotected sex with a guy and two days later it was extremly itchy just around the entrance to vagina, swollen and red.. day three and it was smelling awfully strange.. a bit fishy and pasty discharge. its been 5 days now and im going to the doctor. itch gone down. smelly discharge still there. if this is an sti what would it be if sjowing symtoms after only 2 days??