Reader's Q:

I am a teen who has realized that I am gay. About three months ago, suddenly, I had sex with my friend, one of my close friends. I didn't know that he was gay too, it just happened. I don't know but suddenly I had his dick in my mouth. We didn't do "hardcore" like anal sex, etc... We just had oral sex. He said that was the first time for him. So it was the real first time for both of us. But I felt very guilty then, because I grew up in a Catholic family, so I promised myself not to do it again. But I am still worried about my health. Can I get infected or get any diseases like HIV/AIDS? Can I check my health with a doctor? Can HIV be detected before it becomes AIDS? Because that was the first time for both of us. Can I? Please answer, because I am very worried right now. Thank you very much.