Hello,
Some folks are shorter than others, it is not a thing to worry about. You said you have started your period, so, I doubt if you will be growing any taller. No problem though, there a lot of us "shorter" people out there. I am 5'2"
The word "short" is relative, since some people are taller than average, just as there are those who are shorter than average. You don't mention your age, but one should be careful when certain people claim that you are "too short for your age". As you know, heredity is involved here, but who knows how tall you will end up, if your body decides to grow even a little bit more. Just try to maintain good overall health by avoiding all tobacco products; curtail sugary drinks and snacks; get a proper amount of sleep; exercise; and avoid illicit drugs, for examples.