hello , i am a girl and i am 15 years old . these past 2 weeks i can't eat a lot otherwise i feel like puking and i have lost some weight and a lot of my friends have noticed my weight loss . i have been very stressed these days because of school and other stuff going on , i haven't been sleeping much and there has been a lot on my mind lately . though i don't puke i just feel sick , tired and sleepy and i have mood swings and get angry a lot . it might sound like something normal but i am not usually like this , like i used to hang out with my friends and go out but because of that "sickness" i don't anymore since i am very tired .should i be worried about it or is it normal ,but i doubt it since it has been going on for a while ? and can you please tell me what's happening to me if you have any idea .i haven't told anyone about it . thank you .