How to get more curves?

im rly skinny, 5'5" and 89 lbs. 16 yrs old. i have no curves at all and no hips. it looks like i havent even hit puberty yet. its making me rly depressed. does anyone no how i can get SOME curves? id be happy wit that for now. or how to gain weight or is it js not possible cuz of my fast metabolism? or should i go see my doctor cuz it might be some hormonal inbalance? plz help!