Diet scientists out there?

Im 15 years old. Usually i eat regular amounts of food, super healthy diet, but I'm not a health freak. I watch what I eat but not like "oh my gawd that has 50 more calories then i should be eating! i can not eat it!!!". tt, for like the last few days I haven't been hungry AT ALL, i'm not full either, i just dont have a taste for food. I open the fridge about 50billion times a day, decide 'ehh....nah', close it again, and go open it 5 mins later. I try to remember to eat at least two meals a day bec i know i have to get protein, also iv drunk a lot more water then i usually do, and a lot more wine. Iv also been taking some green tea pills, so idk if those are like making me un-hungry bec there giving the the vits and stuff i need? My tummy is a lot slimmer then it was a week ago, well not a lot but i can tell its trimmer. Also iv been having to do excersie, like stretches and stuff because i dance ballet but i was doing those before i stopped getting hungry. One time, a few days ago, i was depressed and tried to make myself throw up, and then i got scared maybe i was turning bulimic, which is bs btw because i weigh 120lbs and i hate how oober skinny toothpick chicks look. Im 5.7. Also it may be something psycological bec also for the past few days--i always carry a knife on me--but for the last few days iv had it open, and i sleep with it, bec i feel like somebodys gonna come do something to me. idk if thats any part of it??????