Could I have anorexia if I weight 145(65.9kg) and my height is 5'5 feet and I'm 14 years old?

SInce August I'd been trying to lost wight. When I went to see a doctor on september my weight was 170(77.3 kg) pound, so i was pretty upset. Since that time I decided to join a running club and like one month ago my wight was 163(74.1kg). Like two weeks ago I try to know my wight and it was 150(68.2kg). Right now it is 145(65.9kg). I'm not eating properly -according to my mom. After eating I go to the bathroom and try to throw up. I feel dizzy almost all the time! and the running makes it worst. I often talk about how skinny I want to be. when I look in the mirror. I study myself to see how fat I am. My aunt is always saying that I am anorexic, but I don't get how some one as fat as i am can be anorexic! help please! and if you can give me idea to work on mine plan of losing weight i be more than happy to take ir. i want to be just like any other girl because i feel that the skinny girls are always talking behind my back and that everyone sees me just because of my weight! am i anorexic?