i am 16 and 5'8 and wiegh 108. i do eat normal. i eat lots of food but they are all healthy like no MCDeez or fried chicken or soda. but i do have curves. so i dont think i look annorexic. but the bmi thing is calling me underweight... so should i make an effort to eat even more food?i switched from 2 percent to full fat milk today, will it make me weigh a little bit more ?