Obsessed with appearance

Hi, I'm a teenage female. Im easily irritated, i have a self esteem that ever since last summer has put me at a downfall of stress and irritation.. I constantly care about the way my hair looks, i constantly want bigger boobs, bigger butt.. i want everything a young teenage girl would want. However i used to have longish hair down to my collar bone and i had this irritational fear I looked wider with it down and gross and i can't even explain with words.. therefore, i cut it into a bob. Now, im extremely paranoid about the way my hair looks 24/7, even if im home alone, I cant stand to see myself without makeup for long at all.. i constantly want to wear something that makes me feel not little but grown up. I constantly give my mother attitude unless she buys me something that helps my self esteem, then she blames that the only reason im happy is because what she bought.. Well yeah, because it helped my self esteem for a little bit.. Of course, I'm going to be happy about that. I feel terrible as a person, I have constant urges to breakdown and not let anyone see me and sit in my room. Ill sit in front of a mirror for hours, even a day if I have to just to feel good about myself, I constantly twiddle with my hair and want it to grow to the perfect length, and I hate my face because it makes me look unproportional. To me, and nobody understands the way I feel because this didn't use to be me when I was a tomboy when I was younger, I could care less when people think.. I have anxiety issues when I'm with people I don't know, when I have basketball practice with older girls I HAVE to look pretty in some way and I constantly think about what I look like and if I look gross or fat or unproportional.. And it affects my family life, friend life, and with male life. It hurts so bad. And I'm screaming out for help as of now..