Am I fat?? Honest opinions but be polite please!!?

I'm 14, 5"7, a girl and I weigh 126lb. A lot of people have been telling me that I'm fat recently but when I asked my mum she said I was 'fine'. Does this mean that she secretly thinks I'm fat? My best friend says I'm not fat and my dad thinks I'm too chubby. Who to believe ?!??!!