First off I have only had sex with two people whom I was in a relationship with at the time. I do not engage in casual sexual relationships, and they carry a lot of emotional baggage for me personally. So I recently have discovered that my GF was tested for std's because she had been with many people, men and women, and has also given casual oral sex to men. Now, thankfully she doesn't have anything. However, I find myself getting very uncomfortable thinking about her being so intimate with other people, especially so casually. I think I might be a little jealous? Has anyone else been uncomfortable with a significant other's sexual history? Is this normal to feel upset about?