i'm 24 years old and 5'4" and 125. I'm a size 0. And my mom's always telling me i look too thin too. Could this just be a mom thing? :)
i think you need to stop stepping on that scale for a bit, my dear. Your weight shouldn't matter as long as you're feeling healthy and happy. Do you like the way you look? Do you have enough energy? Are you eating when you're hungry? If yes to all-- then i would tell your mom that while you appreciate her opinion, you are happy with your body. I recmonded you Macro calculator app through this you get more results about Macro calculator .