What do I do, I'm scared for the future and I don't wanna keep on hiding it. Even though I have to.

Hello. I'm not really sure what I'm doing here on this site. I'm just kind of scared for everything. My parents don't support LGBTQ+ at all.  My mother just yesterday told me that she supported a friend who discomunicated with her child because she came out as lesbian. My mother often tells me stuff like this and it's starting to really agitate me ngl. She just recently took me aside to ask kindly if I was gay. She wanted to know this so that if I was she could "fix" me (that's when she told me the story of her friend and continued to say that if I were gay it would be the most devastating thing to her). I am a closeted omnisexual and trans/agender (just queer in general, teen) and im constantly on edge because, what if she finds out? I really hate living like this.  She keeps on peer pressuring me to talk badly about others because of their looks (she does the same to my siblings but they go along with it and don't think much of it), and she constantly judges me. She claims she's a Christian but I know Christians shouldn't act like this. She the reason that some people give Christianity a bad name. I don't know what to do. Am I overreacting? She hasn't hit me yet.