Is my grandma fat shaming me? If so why?

Okay so my grandma has this thing where she will comment on how much I eat, sleep and she's said several hurtful comments about me eating while I eat like "You're eating again?", "you sure do eat a lot" and such this hurts.

It's not like I'm wolfing down huge meals as my sleep schedule is off AGAIN so I don't eat much later in the day until like after she's gone to bed though I know I shouldn't eat that late.

I'm not obese though just overweight because I'm 16, 5'0 and weight under 200lbs and the average weight for girls my age, height and weight is less than what I way also considering how much I sleep I lose some weight.
Is my grandma fat shaming me? If so why?
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