I guess I don't really understand. You've only made one mistake in your life? Unlikely. You're just not judging yourself for the others the way you are for this one. We all make mistakes pretty much every day, most very small. But it's very hard to understand, the only things you know you have are unrelated to having sex, and sex seems to be the one thing that can make you feel guilty. Okay, that's who you are, but you're fighting these other things that have nothing to do with sex and nothing you did let down your parents. We all have sex, it's what humans do. You should have used protection, and you will next time, right? In the meantime, everyone gets sick at some point and we all will die of something. That isn't letting anyone down, and from what you say, you're not at immediate risk of dying for a very long time most likely. So tell us again, why are you feeling so guilty for having a risk of cancer, a that still seems to be your main problem?