First, you are self-diagnosing, which you can't do. Second, HOCD is a term, not a real thing. It's not OCD. It's a form of phobia where someone becomes irrationally terrified they are gay. It generally flows from bias against gays, because if we didn't have that it wouldn't bother us. Obsessively thinking about things happens. Sometimes it's an anxiety disorder and sometimes it's just a bad week and sometimes it's stress and sometimes it's just the disorder called being 15 years old. Your brain is still developing, and your personality is changing from a childhood one to an adult one. Being in between can be maddening. And a lot of fun. If you're bisexual, and if you like guys you're not obviously exclusively gay, it might be because you want an adventure or it might be because that's who you are. You're too inexperienced having actual sex to know yet. In the next few years you will find out for sure. In the meantime, if you find this becomes destructive to your life, seeing a therapist to hash it out can help. Having such thoughts is normal. And common. Only time can answer the question of your sexuality, because if you're not sure, you can't really say one way or the other. You get a lot of thoughts in life that have bothered you, I'm sure, as we all do, but you didn't label any of them OCD. This one you do. Why? Because it's so wrapped up in sexuality and in something that has been stigmatized for the last few centuries. Peace.