I think I have HOCD and I want it to stop

I started to question my sexuality over a year ago when I was 17 and I believe it also caused me to develop HOCD. The reason why I started to question my sexuality was because I was aroused by dicks for a good 4 years, I would watch videos of guys masturbating and I would get aroused by it. However, I've never had any actual sexual desires for men, never fantasized about actually having sex with a man, never wanted a relationship with a man, I only ever wanted one with women, my arousal to that certain thing was the only reason why I stared questioning my sexuality. I also was never really aroused by the female body for several years, so during this whole phase I tried to see if I could become fully aroused by just a naked female body and sure enough I was, and I consistently started feeling aroused by videos and pictures of just naked women. I've always been aroused by sexual thoughts with women in it and straight porn though. I would masturbate to those thoughts and straight porn as well. For the past year I would be testing myself out with gay porn, gay thoughts, etc to see if I would be become aroused and so far I have not. But over time I've developed this weird groinal response whenever I would see anything "gay" or when gay thoughts would pop through my mind. I would also even feel a weird groinal response when I saw an attractive male. Btw, I still feel the groinal response to this day, and I want it to stop. Recently I've even been getting erections from the groinal responses. Recently I've gotten 3 erections from the groinal responses. Last week I saw an attractive guy and I was thinking to myself "I don't find guys attractive, I'm straight" in my head for like a good minute. And then after that a brief thought of sex (straight sex) would pop through my mind and then I'll force myself to stop thinking about it. By that point my dick felt stiff, but I was still forcing myself not to get hard and I was constantly thinking of not getting hard. Then I thought of my dick getting hard and then I eventually got hard. It left me in such confusion. It left me thinking if I actually got hard from the guy. Even though it didn't actually feel like arousal, I still got hard. And it left me confused. For this entire phase that I've been going through I would just feel this weird feeling in my dick, my dick would kind of stiffen up but it wouldn't get hard. The same thing happened today. I saw a picture of an attractive guy and I went through an entire thought process. I would think "I'm not attracted to guys, I'm straight." And then I would think about my dick actually getting hard and then boom erection. It's just like wtf!!! It doesn't even feel like actual arousal. So can someone tell me are these erections and groinal responses actual arousal or is it a part of the HOCD? And how can I get rid of it? I really want it to stop.