I'm 17, 5'3 and weigh 112lbs

i think i'm pretty skinny but my mom always makes me doubt myself and says i'm too fat. but i think it's just because she weighed 115lbs all the way until she had her first kid (at 25) i don't know why she calls me fat she's even asked me if i'm pregnant before ! 😕 . is my mom right for doing this?