Quick questions regarding HOCD.

So far from what I've seen, HOCD seems to "pop" out of nowhere, at least that was my case. I was watching Holes (The movie), and all of a sudden I thought, "What if I'm a lesbian?" When I'm reading other people's stories, it seems like none of you guys have ever had this issue before and it was random and it "popped" up. Because I know that if someone is truly gay/lesbian, this issue wouldn't have popped out of the blue, right?

The other question I have about this is before this HOCD happen to me, I was very happy with my boyfriend, everything was perfect. I was 100% confident of my sexual orientation. I've had numerous boyfriends in the past and I was very happy with all of them. It seems like everyone is like this as well, before the onset of HOCD, everyone was happy and they were confident in who they were, correct?

My last question is this, and I've been searching google for answers and it seemed like I got 90% no to my question. Can HOCD turn the sufferer gay/lesbian because they think too much about it? This is my main question that I want to ask you guys and see what you think.

No you can't turn gay. Would you rather be with a man or woman? Answer that question in your head and if you get anxiety stop, because that's your ego trying to make you avoid the truth. If you have anxiety try to breathe and let your self be calm and then try to answer the question. If you're still having trouble you need to go to a therapist since it doesn't go away on its own.