Weird HOCD habit?

Hello again, I'm back again posting about something that has been bugging me recently.

So I've noticed I've been having a lot more gay thoughts along with a few groinal responses. I don't understand why since other days I wouldn't have these responses. Also I know this may sound weird but whenever someone asks me a yes or no question, in my head I think the question being asked is "are you gay/straight?" So like if someone asks me a question that I think I'm gonna say yes too, I get thought that says " Are you gay " and I feel like I'm going to still answer yes but not to the questions I was asked but to the "Are you gay" question in my head. It bugs me that I feel like I might still think it or say it. Also whenever my dad teases me about boys, I get a thought that's saying I may not like them but I feel like I do because I notice cute boys and stuff but I feel like my attraction has kinda decreased :/

I'm scared I might be "accepting" the thoughts or that I'm transitioning to a lesbian but I don't want to do any of that stuff. These things seem to always kick up around the time of my menstrual cycle and the first days after. Could I be having some sort of chemical imbalance? I mean when I talk about having a boyfriend I get happy about the subject. So I just don't really get what's going on, what if I stop resisting? I mean what if I stop getting grossed out? It makes my heart race, I feel like my heart drops at the idea.

Any advice?