Hello. I am a 12 year old female, and I weigh 84.5 pounds. Am I under or overweight? My dad says I'm overweight and my mom says I'm Underweight. When I sit, I feel like I'm fat.Because, it looks kind of big, and when I look in the mirrior (sorry, can't spell) I look like I'm skinny. Please help me. Thank you! :)