I admit, I'm a bit risky. So I'm just a teenager, and I somewhat became extremely stupid. Last week, I received an oral sex (I'm a man, and a gay sucked me). It's just fellatio, and no anal sex occurred. I don't feel any symptoms, but from that day, it seems like I became cautious when it comes to my body. It's unprotected. No condoms, and I asked him if he has any STD, and he said none. Even though he said none, I'm still extremely worried. What diseases can I get (in case, because I've read that it's only a low risk when it comes to receiving oral sex)? What diseases can I get? And what are there symptoms? Is it really low-risk? Is it true that HIV and most of the STDs are not transmitted via saliva, because it's only his saliva that contacted my penis? What should I feel and do? Now, I'm extremely worried/anxious, and all I want to do is cry and pray and trust that supernatural being. Please help me. Please.