I would think that she probably messed up measuring.
My height stopped growing around 14 (I'm about 5'6" and a 1/4 still today:P). When the school did the yearly checkups for height/eyesight/etc, I was told I was 5'5" one year and 5'7" another when my height didn't change. Same thing happened at doctor checkups when I went.
Based on the fact that you said she was short/had to reach up pretty high, I think you're probably the same height as you were when you last checked. I would still vote on you double checking your height at home and see what it says.
Edit: This is my opinion based on the skills of humans with measuring

(don't take this as 100% correct).
Good luck