I will turn 15 in 3 months and I am 5'1. I got my period a month before my 11th birthday. I read that girls stop growing at 14 or 15, depending on when they started puberty. I took a tanner stages test that said I was done growing. All of the other height predictors I have taken tell me I will be 5'1 or 5'2 at 21 years old. I have zero problems with my height. I'm just curious.
This really depends on your genetics and nutrition. Some don't stop growing until about 19 or 20. Eating well increases your chances of growing and if you have taller parents or are shorter than both of them at this point, there's a chance that you could grow possibly a couple inches.