im 23 years old, 5ft and half an inch tall, weigh about 99lbs, and my bust size is 34b. lately ive been really tired, my breasts get slightly sore off and on, and im constantly hungry no matter how much or how often i eat. ( i make it a point to eat 3 full meals a day, and i drink plenty of fluids). and also, ive been waking up in the very early morning hours, and will be wide awake and alert. (i have never been a morning person). i am not depressed, or stressed out,could i be going through a growth spurt? ive taken multiple pregnancy tests, and have eliminated that as a cause for this. other than these symptoms, i feel perfectly normal.