Why am I so small...?

I'm a 19 year old guy and I'm just over 5'4". I'm so short! I also have small hands. My feet are tiny too. I wear size 8.5-9.5 depending on the shoe brand. I take my shoes off and people comment on my small feet. I give someone a high five and they comment on my small hands. I constantly get told how short I am. I cant take it anymore. I'm aware I'm small! Not to mention all the careers I'm interested people tell me I'm too small to do. And now I'm starting to believe them. I'm not scrawny though because I've been working out since I was 14 so yeah I do have a lot of muscle but no height. My mom is 5'2" and my dad is 5'8" so yeah i'm saying that it's in my genes but my grandpa was 6'0" and my gramma was 5'8" so idk?