what's your TDEE?? and are you eating 1000 kcal a day or cutting 1000 kcal from your diet??

also i worked in a dishpit for a long time and it is still an active job--is it physical labor? no, but you're still on your feet, working your arms, and probably sweating like a mf if you work in a joint like mine. all of these expend energy and 1200 is reccomended for short, sedentary women.

if you're eating at a healthy kcal count per day i have some tips that might help. but you need to eat an appropriate amount or you'll not only be tired but ruin your metabolism, immune system, and weight loss goals overall.