Is my height normal?

I'm 15, and it's like I haven't grown in such a long time. I've been this height (between 4'9, 10) for many years. It's really discouraging to see all the people I know growing around me, and there's just me, who hasn't grown at all. It's like I'm only growing outwards (thighs and hips) but I've been the same bra size for 2-3 years. My mum and dad are short, so is my brother. Should this be something to look into?