Almost every time after sex my vaginal area gets very swollen. It gets so bad sometimes that I have to put an ice pack on it. It's also very painful to touch and after he finishes inside me (we don't use condoms) it burns. I thought that perhaps I'm allergic to seman, but it's rare, so maybe not. We aren't super rough, its not marathon sex, and lubrication isn't an issue, so I'm at a loss. Does anyone know what it could be or have experienced the same thing?