My anxiety with stuff that going on

I'm not a native speaker so please don't judge my grammar. I'm currently in high school and feel depressed or left out at home and school. when I did something wrong, my mom usually just take my phone and iPad (for the records she used to take my phone for the whole month) it made me feel left out of the community. My mom judges my body and stuff a lot, I'm trying to think that she has this cliche thought but sometimes it gets into me and I felt this thing coming up to my throat and making me wanna cry so bad from these things that keep going on and on. Yes, I'm an introvert, I have strict parents, and I need to keep my grade up. Usually, in primary school, I always got good grades but when it comes to high school everything is completely different. I just hate the fact that I can't use the word 'freedom':(( sorry for spreading negatives. I got no one.