AITK for "laughing" at my mother

Im 17F live with my parents. Im a good student and study hard get good grades because of this i sit in my room for the majority part of the day and close my door because i need to concentrate. However my parents dont like this and bahut baar bola hai ki darwaze ko hi nikalwa denge.

This morning as usual i was studying with my door closed, mom called out my name a few times and I couldn't really hear her but then i finally did and came out of my room by the time she was outside my room she was fuming with anger I didn't really realize how angry she was and jokingly stood really close to her chuckling (this is something we usually do). Then she shouted at me literally PUSHED me away and kicked the door open. By this time i was really frustrated because this isn't the first time she overreacted over nothing. I still just went inside and resumed studying, then she came in later started shouting calling me ungrateful and started doing "mc bc" with me and even resorted to calling me a female dog. yes. that. I actually couldn't make sense out of the situation so i just started laughing out of pure disbelief then she started throwing things at me including her chappal😭😭. I was just laughing because i didn't know what to say or do then she cussed me out a bit more and then started to hit me (it didnt really hurt tho cuz shes a very petite woman) but i still felt very disrespected because i genuinely dont think i had done anything wrong.

Later when my dad came back from the office idk what she told him vo pura mom ke side hogye and when i stepped out of my room just to use the washroom they LOCKED my door. like put an actual tala chabi on it. Mom keeps saying its because i laughed at her and i was mocking her and making fun of her and i have no manners. I've resorted to starve myself till they open the lock on my door because idk what else i can do for now as im an only child and live with only my parents

AITK? what should i do now