I'm 15 years old, and the other day I got with this girl at a party, and I came very close to giving her oral sex. I did though, use my hand to excite her at her vaginal area, and as embarrassing as it was, to my horror I saw blood on my hand. She claimed it was a cut from recent sexual activity. When I say that I came close to giving her oral sex, it means my tongue may have made contact once, before I backed away. If it did make contact, it was very small. Anyways, I began worrying about STDs, and two days later, (today,) I noticed that I was developing a sore throat. Is this some sort of STD? There is no way I can let my parents know about this. Also, there is of people out from the flu at my school so that could be it too.