WHY AM I SO COLD? I'M A LITTLE OVER THREE MONTHS

OPEN RNY AND AS OF TODAY I HAVE LOST 50 PDS (WHO0PPEE) BUT I AM ALMOST PAINFULLY COLD. I KNOW THAT I HAVE LOST SOME OF THE FAT THAT KEPT ME WARM, BUT I CAN'T EVEN SIT OUTSIDE WITHOUT A BLANKET. I ALSO THINK MY IRON IS A LITTLE LOW, BUT WHAT ELSE COULD CAUSE THIS COLDNESS?

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