Dear Elizabeth,
You may be embarrassed to talk to your doctor about your weight, but he's the one who can give you the most accurate information and tell you whether you should be changing the way you eat. Often, girls your age, who are going through puberty, start seeing changes in the way their body looks, curves where there were none before. That doesn't mean you're overweight. Regardless of your weight, being physically active is a positive thing. You'll have more energy, feel less stressed, and look better.