Do I have an eating disorder?

My parents keep watching me and my friends seem sceptical. Perhaps I'm just a dieter? I'm really not sure since I don't know much about ED's...all I know is my behaviour isn't normal.

I keep my daily intake under 500 calories, only eat foods that are very low in calories like jelly, miso soup, broccoli [100g=33calories], ryvita...i know the calories in everything etc. I get upset and want to cry if people make me eat a whole meal, where I start feeling horrible and sick with myself. I've tried to be sick numerous times. But now I know that it's hard to make myself throw up so I just don't eat as much at all.

Typical day:

- 1 ryvita for breakfast [35 calories]

- 1 miso soup for lunch [36 calories]

- 1 ryvita to keep me from feeling dizzy [35]

- Some sort of very small portion dinner because my parents watch me.

Sometimes I'll chew a biscuit and spit it out.

My average intake a day sometimes is about 300-400 calories since I will drink tea/ sometimes have to eat a small snack in front of my parents so they think i'm eating.

I'm nearly 5 6'' UK size 8 but I feel really fat..when I see a picture of a skinny girl or see one, I can't eat if I'm chewing something and have to spit it out.

When I think about weight I'm really depressed but I'm a really cheerful girl otherwise! I'm popular, but I'm a musician...you see all these beautiful skinny people and I feel like I can't compete as my ugly self. Low self esteem etc..

I know I have a problem but I don't feel the doctors probably wont take me seriously...I've had this problem on and off for 4 years. I lost a lot of weight a few years ago and after gaining half a stone last year, it put me back into this mode again, making me feel fat and ugly. But I've been on this extreme behaviour for a few months..I feel tired all the time and sometimes feel like I can't get to class and want to sit down but I wont eat, I just want to be A LOT thinner :( then I will be happier

Tell me your thoughts...and please don't leave nasty comments. It's taken me courage to even ask on a forum of random people..you have no idea how horrible this is..if you don't have anything like me and have a safe frame of mind then honestly, you are lucky.

x