!!

I'm a 16 tahun old female (about to graduate her sophomore tahun of high school) & everything used to be okay. I was a 4.0 student (up until now), I had a few friends to hang out with on weekends, I studied hard, I got along with people... But now I just feel terrible. My grade point average has dropped to a 3.7 (which is still good but... it's not good enough) & my mom never ever helps me at all: she always makes things worse with all her yelling and screaming at me to "get skinnier" and "go on lots of diets" and "lose weight lose weight!" and "go to gym anda need to lose weight" but...