11th result ( getting absolutely cooked)

Today was my class 11th result. Throughout 11th, I had gotten 60-70% marks in PCM, but lied and told my mother I got 85-95%. Today was report card day and she got to know that I scored 71%(55% in math). I got absolutely cooked at home and she took away my computer which I use to see lectures. She also keeps telling that my marks are decreasing(I got 94% in 10th) as im going to the gym and threw my whey protein and creatine 😭🙏.What should I do chat? Ts pmo fr 💔🥀.