ok so I'm 16, weigh 50kg, and am about 5.3. I have never been a big eater and for the past few years have not eaten the amount that I should. I no longer eat breakfast or lunch but only dinner because I have to. mum has recently made me start eating breakfast which I hate so I felt as if I had to throw it up. in the past few days I have only just started making myself sick and I feel as if I have to do it to feel good about myself. I know it is the wrong thing to do and I'm trying to help myself before it gets worse. my sister who is 3 years older then me is much smaller then me so I'm like the fat one and I hate it. I feel as if I have to be smaller then her. I'm not even sure if I have an eating disorder at all. I just want to be happy with myself. when I made myself sick I knew it was really wrong and I started crying, but yet I continued and for the last few days all i can think about is what am i going to eat and where and when can i throw up without anyone knowing what is wrong with me, please help.