I know I'm straight, but I my brain says no?

Ok
So I know I like girls and always have.
Last weekend I even I started taking with my big crush.(Yes a girl)
I got this thought in my brain that said
What if I were a gay?
and it has been bugging me for a day now.

I've had this thought before, that happened before Christmas and after a week it went away.
I don't know if it is just hormones or if it is a phase.
I don't find guys hot at all.
There are guys that dress nice, but I don't have crush on them.

I think it is also that my brain likes to think stupid thoughts.
For a week once I had a thought like "What if I we're vegan?"
and I got so mad with it. I also had one where I did know if I should get an Android or an iPhone.
I also kept thinking about it a lot.
When I stop thinking about "what if I we're gay" thought, I think normally.
When a hot girl passes by I don't remember the thought.

I'm pretty sure I'm straight.
Anyone can give me advice to lose this thought?
I got rid of it before but I forgot how?

If you think you're straight then you're probably straight. I've thought some pretty *** upped things before. What matters is if you act on them. And if you did happen to be gay, then so be it. There's nothing wrong with it.

Just because a thought crosses your mind, doesn't mean you have to take it seriously. Don't believe everything you think!