My girlfriend is 16, 5'11" and weighs about 127 lbs. She has a lot of things which I think are problems and I can't seem to figure out what's causing it all. She is always cold. She has irregular periods and light mentrual flow. She is often very hungry and eats a lot (as a vegetarian). She bruises very easily and the bruises often remain for an unusually long period of time. She experiences headaches and dizziness on a regular basis, often when sitting up too quickly. She is drowsy oft times and falls asleep on the phone as early as 9 pm. Any ideas or interpretations would be greatly appreciated.