u/Ginnyyyyyy28

Hi there, im a 13 years old girl (Vietnamese). I know im still very young but i had an agruement with my mom that i want to share. Yesterday, my cousin called me to help her with her English homework. Because im living in Japan right now and she is living in Vietnam, our timezones are different so when she called me, it was already 10:30pm in japan (8:30pm in Vietnam),. It was quiet late but i was still willing to help her with her homework anyways. So, we created a zoom meeting and i started teaching her. It was so much fun because we got to talk and study together. Until my mom stormed into my room and yelled at me why i hadn’t gone to bed yet, i just simply answered that i was teaching English to my cousin but she got ANGRY. She said that’s none of my business and i need to go to bed early, which made me very upset because i was just trying to be a good cousin and since i dont have school tomorrow (today), i think staying up a little bit later is fine. I tried to explain but my mom kept forcing me to end the meeting and go to bed, and even when i ended the meeting, my mom saw my phone that i used to record the meeting and took it away. I was angry and yelled back “ why did you take my phone, i used it to record!” my mom said that “to check if you downloaded youtube” which is hilarious because that is MY phone and i dont see the harm of dowloading youtube since everybody is using it and sometime i use it to search for online lectures. After that, we argued for about 15 minutes. I explained to my mom that i was just trying to help my cousin and stuff, but she kept ignoring me. She said i have been staying up late to study for too long, and she doesnt want to raise someone that keep studying up late like that. I KNOW that staying up late is bad for my health but i have to study for this really hard English certificate (Eiken). And my schedule is kinda busy, i go to school until 4:00pm, then club until 4:35pm, and the second i got home, i have to go straight to my extra class, after going back home then eat dinner and take a shower and stuff, it’s already 9:00pm and how tf i can do all of my homework and study for the English certificate when i have only 1hrs and a half? I tried to explain but she kept saying that’s because i dont know how to manage my time and stuff. I was angry and frustrated because she never listen to me and always thinks that im not busy. And when i kept saying, she yelled “SHUT UP AND GET OUT OF MY HOUSE” and that made me broke into tears. Luckily, i still had my ipad in my room so i quickly send a voice message to my cousin while crying uncontrollably. But my mom somehow heard it and walked into my room (again) and took away my ipad as well. She said that she doesnt want to raise me anymore, if i want to stay up late to study then get out of her house, there isnt any 13 years old kid that stays up late like me. I think it’s hilarious because i just simply like to study at night and once i start to study, i cant stop. Me and my mom havent talked to each other for a whole day.
TL;DR I hate it, i know staying up late is bad but i just like to study and that doesnt affect my mom at all. What should i do?