Hi, I am a 5' 1/2-1" girl, 17 years old, with an athletic build and muscle. I am really concerned I am overweight. I have never weighed what my scale is telling me I weigh, however the scale could be broken but still. The scale says I weigh 127.5-128. I weigh too much, don't I? When I sit down I have a stomach but when I stand up everything minus a small part of my stomach is pretty firm. I just calculated my BMI and it was 24.2, which I am pretty sure is borderline overweight, if not overweight. Can you help me please, help me understand what is happening with my body.