What can I do to help my Body dysmorphia? The face behind the freak?

Hi, Im a 14 year old Female and I seek the advice of others about my Body Dysmorphia. I have always had issues with my self esteem and body image since I was around 4 and as long as I can really remember. Infact when I was 6 I started dieting and managed to loose a stone which I regained in around 10 seconds! At the moment I stand at 5.2-5.3ft and weigh 9.10lbs, I go to an all girls school and have always had issues with my weight. The other girls in my school are skinny, beautiful and most annyoying at all confident. Don't get me wrong, I love my school but I would love to overcome my issues and overcome my 'illness' so I can be more confident and generally happy with my self in the future. A few examples of my low confidence levels are as follow; I won't go out with no make up on, I way myself every morning and night and diet constantly (YOYO) and I generally get very depressed about myself. Another thing, near my school is a train and round the corner a boys school is situated. Everyone at myschool and all of the boys from the other school get the train and meet up at the station. In Y7 I used to suck up getting the train and get the journey over and done with as quickly as possible, now however its a different situation. If I have to get the train I will stay at school until around 6pm to avoid seeing anyone at the station. The reason you ask? I do this because every time I get to the station I feel like Im on a runway and everyone is watching me and judging me and Im not good enough. I get very red and very very nervous. At school no one really knows of my condition as I have learnt to avoid certain situations and I put on a loud, bubbly and kind character on in class. I call this my mask. At school I often spend my days going from bathroom to bathroom checking my make up and hair, my friends pressume this is cause Iam vain and not unconfident. A large majority of my insecurities come from home aswell, my close family is strange as it includes anorexics and those who are obese (curvy) My mam is probably a big part of it, I don't blame her and although she is never negative about the way I look I can't help but feel depressed everytime I see her. She is very pretty, curvy in all the right places and very glam. When Im older I aim to be a fashion Journalist or designer, Im very into fashion and I strongly dissagree with the projection of 'real women' on catwalks and how designers find size 0 way more attractive. I personally think Body Image should be on the school curriculum and I think curvy 'real women' should be encouraged and prasied upoun.Im sick of being the girl who is afraid to take risks and who feels physically sick everytime a photo is taken or she looks in the mirror.Its not like I havent tried to become more happy within myself, but Im finding it notourisly difficult to find my long lost confidence. Now I don't want a whole sob strory like most fellow teenagers but the last 2 years have been very difficult for me and my whole family for reasons I do not like to discuss. I feel like to grow up and to blossom into a big, loving, confident girl I need to find my self esteem. Going back to my previous statement about working in the fashion industry, I uttelry agree with the whole body image riot going at the minute in fashion and I would love be able to say Im happy with the way I look. Im sorry I have gone on a little here, but I really needed to voice my feelings and sad thoughts to someone. Its not just body dysmorphia I suffur from, I suffur from lack of confidence in many things, but I would like to tackle my self image first. I would really appriciate some replies, storys, comments and general advice. Im only 14 and I really need to stop worrying, but I can't. Please Help a hopeless worrier like me.