im a 15 year old girl. 5'2". 103 lbs. ive lost weight since late august. 12 lbs in all. and ive been exercising and eating the same until recently. ive been feeling nauseous in the mornings for a while, but now its constant and my appetite isnt nearly as much as it was. i'll eat light meals every day cuz i feel like if i eat more, i'll be really sick. i can't sleep very well, and even if i get more than 7 hours of sleep, i feel absolutely exhuasted. any sort of physical work seems impossible. i tried to run earlier today and only made it half of a block before i stopped because i couldnt breathe and my head was pounding. ive been having pains in various places, including my chest (pressure, frequent), head (piercing, frequent), back (dull, constant), and right side (sharp, stabbing, frequent). the thing that really scares me though is that ive had a cyst on my right jawline for years, but the doctor said it was fine unless it started to grow or hurt. The past week, ive had a radiating pain from my right jaw down my neck and throat, and i dont think its grown, but im afraid to touch to find out because it hurts. i went to the doctor in early september, but they didnt find anything, but all they did was an ANA test (which was negative) and tell me i had costo chondritis (rib lining inflammation) and anxiety. parents wont listen. please help me!!!!!!