So me and my boyfriend (both 15) had sex for the first time a few weeks ago, we continued to do this regularly. About 5 days ago however, it was rougher and he lasted longer than usual. afterwards I was in pain as my libia majora (vulva) was very swollen and hard. For the past 5 days or so, it has been agony and extremely painful and I find it hard to walk, sleep, sit down etc. I thought it would disappear but it has not. Please help thanks