I'm married, have no kids, and have been having sex now for two and a half years. Up until about 3 months ago, the sex was great, with no pain at all. Then, I would notice that after sex, the inside of my vagina would hurt. Also, the outer area of my vagina swells after sex. I can only have sex about once a week now. There isn't any one particular position that causes the pain more than others. It seems like it's always after sex that I begin to hurt and swell. Sometimes the pain is so great that it hurts to sit or wipe myself. Does anyone know what this might be, and is it serious? Thanks.