I had unprotected sex 2 nights ago. When I got home later on that evening I noticed burning while urinating and then over a few hours, there is small areas that burn and are a little irritated on both side of the labia minora, near the opening of my vagina. I do not have any discharge or any other symptoms besides the burning and irritation. It s slightly red but not noticeable. We did not use any lubricant so it cant be an allergic reaction. There are no bumps or lesions. It feels sort of like when a tampon can dry out your vagina.