im sorry to hear you going thru this. i dont have cf my son does and hes 5. so no picking on going on yet. but i will tell you when i was in high school i too was small. i was a gymnast and gymnast develop later in life. at least not as fast as other girls. anyway i had no, and i mean no chest. flat as a board. i was all skin and bones. and of course muscle cause im an athlete and i got picked on so bad. by boys so much and the girls were aweful too. the teasing alone was terrible. i know how you feel ugh being a feshman sucks so bad.
advice i can give you is your high school years fly by they zip right thru i knw it feels like forever in that school but believe me its not. when i became a sophmore i was more comfortable in school knew my way around and the kind of people i didnt want to associate with. if u find just that one friend who truly connects with you it makes all the difference.
oh and im almost 20 years out of high school now and i dont even have contact with a very large portion of the people i was forced to see those four years. and no one is any better then the other now. but the ones i am in contact with now are the ones who were with me thru the good, bad, and ugly. hope this helps a little good luck!!!!!
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Elizabeth