My grandma is so strict!?

My grandmother came to live with us a few weeks ago. but know she has gotten out of hand! Do you know what she did? While I was getting ready for school, i put on ripped skinny jeans and a tye-dye hoodie. She freaked out and decided to punish me. She told me to put on this. it was like a long skirt and a ruffly white blouse and she put my hair in pigtails with big bows! She tucked in my shirt and wouldn't even let me wear a bra with it so i looked terrible! She brought me to school and walked me in and made me hold her hand then in front of a bunch of my friends and the boy I like she planted a huge ruby red lipstick kiss on both my cheeks and my forehead. I looked so terrible. When i got home I started crying and she told me if I wanted to act like a baby and cry then i could so she made me sit in the corner like i'm 2! Then she told me to take a bath so she stayed in the bathroom with me washing me and know she does this everyday! THen once I brought home a C+ on a math test, she freaked out! And then she decided to totally humiliate me. So what she did was treated me like a baby the whole day! She made me undress in front of her and then she made me get into a wunzie and but in a binky! And she fed me baby food the whole day and made me only drink formula out of a baby bottle! And i had to wear a diaper and she had to push me in a baby carriage everywear! And the worst part was she said when she passed my friends: " isn't Katherine a chubby baby! And she took my friends into a store and just like you know like lifted my shirt up to my well like halfway up and they saw me and i am kinda chubby when im sitting like almost everybody is. And know everyone calls me chubs awubs and stuff! Help me please! i wanted to punch her and I had to wear a bonnet! Okay please tell me what I should do honestly cause she's terrible. Thank you so much.