Excuse me, How Under?

I'm really mad right now! One word describes it all... SHORT! I hate being so short, I hate being confused! Today... After gym, the gym teacher told all the girls to go to the nurse because they were going to measure us. I mean height and weight. I wasn't scared at all... I mean I was hoping to be at least five feet tall... My best friend Jenn weights 94 pounds but is 5''1 and she's 13, and so does my other friend, but she weights a little bit more. So... my turn came and the lady told me... You weight 91 pounds and you are under FIVE! and then I was like... excuse me? Under Five? How under? You are like you are 98 (centimeters or inches i cant remember what she said) Last time I went to the doctor (January) the lady said 4''6.... weird... because in seventh grade I was 4''11 so I think the lady at the hospital was blind...or did I shrink? I dunno, when I go to the grocery store, there's always I measuring tape thingy and it says 5 feet most of the time! I'm really confused. I want to grow! I'm one of the shortest girls in eight grade! I'm wondering if someday I will receive a growth spurt or something. Both my parents are short but no as short as me! Sorry about my worthless rant... I just need it to write about it...I guess