Am I too fat? Big ? 14.?

Okay well I am 14 and 1/2 and people say I look older. People say I look like a senor. People say I look 30 pounds less than I am. I weigh 155. I think my body is a nice size but idk. I am a curvy girl. I have a thin tummy and bigger s than most girls.... I'm a D cup.. Do you think there is something wrong with me? I'm 5'6'' , 5'7''.