Would this be something leading to anorexia or an eating disorder?

Recently I began watching what i eat, since my visist to the doctor, probably last year in october. He told me that i am on the verge of being overweight. At that time i was 125 pounds. I was and still am 15 years old and the height of 4'11 (3/4). I didnt care about my weight much until i decided i better watch what i eat and actually get some exercise. Now I've been doing fine. I've been eating what i want to eat but with limits to the quantity and ive been dancing and running a couple of times a week for the exercise. But recently i started to notice that i wasnt eating much. This is unintentionally, and i dont mean to do it because i want to lose weight. I just for some off reason lost my appetite and feel like throwing up when near food. I do eat, but its hard because of the throw up feeling i get when i do eat. Whats going on?

I think your in denial of having an eating disorder if you don't eat enough you are gonna feel sick to your stomach that's a normal reaction and at your age it is very common for girls your age to have these u say u didn't care but you want to lose weight and you start eating less and exercising so you do care you better watch out and get some help i had a really bad eating disorder when i was 15yrs im 5'6 and i got down to 105 lbs i was SO skinny but no matter what i ate i felt fat i used to go 5 days without eating anything then when i did eat i began throwing up my food at first it was on purpose and then i couldn't help it i just gagged it down and it would jus come back up this went on till i was 18 and the only thing that changed my life is i got preg at 18 and i forced my self to eat if i threw up i ate more id prob be dead if it wasn for my son i am now 21 and don't have an eating disorder any more and it all started the same way as it is to u so please just get help before its too late trust me i know!!
good luck