About a week ago, I started getting this pain during sex. I thought it was from lack of lubrication. My boyfriend got what he thought to be a blister and said it was really sore. The last time we attempted to have sex, we couldn't because it was too painful to insert. Now, he has this burning sensation when he urinates. And I can only feel pain when I sit a certain way. Its not in my stomach or ovaries. Can someone give me some ideas as to what is might be?