Am i fat?? my total body fat is 13.4?

i took one of those body fat test online. this is probably no accurate at all. it should be around like 10 i would guess but still. i am really really athletic and i am weridly strong. i get call a dude and a cold blooded killer lol but guys cause im so strong. im the strongest and most athletic in my cl. i weigh 126 and am 5'1. and im 13. am i fat. i wanna be alll muscle. i play around 4 sports all year. i go to teh gym at least once a week. i do 20 reps of 20 pounders and i could probably move up to 25 or maybe even 30.