Not happy at all

I have been feeling so sad and somber these few months. Family who are pushing me down by making fun of my looks, what I say and what I want to be. They have planned my whole future for me that I don't even want to live and if i talk about what I want to be when I grow up my mom immediately tells me that I shouldn't do it and that she will get mad if I don't do as what she says. I feel heartbroken about throwing my plans for my future away which is basically the only reason I want to continue this life. I also feel incredibly insecure about my body because I get reminded every day by my parents and siblings how ugly I am. I also have exams in a 1 week or so where I don't feel motivated about to start learning. I'm still 15 and not able to do the things I want without having parents permission. I know I am not going to listen to them but I'm afraid of getting more abandoned then I already am and it's not a good place to be in. I know that I'm not giving up because I dont know what the future holds for me. But right now..... it feels terrible.