I agree with Zach. It's completely normal to be self-conscious, but the only way to get through it is to accept yourself and be proud. Easier said than done, I know. I used to be the same way [still kind of am at times] but I forced myself to see all the other girls in the locker room- none of whom are top-model shape- holding themselves shamelessly and with pride. I took my inspiration from them and learned to be proud of my body as well. Just keep telling yourself that you are a beautiful person that is growing into a more beautiful woman and, in time, your embarassment will fade.