Yeah being gay or lgbtq of any kind is rly hard, especially when you had thought you weren't before and then all the doubt and questions pour in.
But even though it doesn't feel good sadly it is a normal and okay experience, and it's mainly caused by the cis/het society refusing to acknowledge and accept us. You didn't choose to be gay, and it's hard but it is also normal. You'll be okay sooner or later, whether that means you stop hating it or others start accepting/validating you, in the end you'll be fine.