Stress about HOCD-SO-OCD

I know this is not the right sub post this but i just want to know what I am.

I’m a guy, 16y and before all of this happened, I had never questioned my sexuality—not even once. I was attracted to girls my whole life, had crushes on them, watched straight porn, and I was even in a relationship with a girl. I genuinely loved her, we kissed, spent time together, and I never had any doubts about my sexuality.
Everything changed after I took a supplement. Soon after, my libido became extremely low, and I could barely get erections anymore. That scared me because it was so unlike me. My mind immediately jumped to the thought: “What if I’m actually gay?”
That single thought caused so much anxiety that I became obsessed with finding an answer. Since then, I’ve been stuck in what feels like an endless cycle of intrusive thoughts, checking, analyzing, and doubting everything. I constantly monitor my reactions, replay memories, question my past, and try to figure out what is “real.”
One of the hardest parts is that I sometimes become convinced that the supplement somehow changed me or “made me gay,” even though another part of me knows that’s probably just the OCD talking. The fear feels so real that it’s hard to separate anxiety from reality.
Before all of this, I never had these kinds of thoughts. I never questioned my sexuality, never worried about being gay, and never felt the need to analyze myself. It all started after my libido crashed and I panicked.
Has anyone else’s HOCD started in a similar way? Did a physical change or a stressful event trigger the intrusive thoughts? I’d really like to know if anyone can relate because this has completely taken over my life.