Hello CryingontheInside. Your mother's comment was horrible and verbally abusive. That is a reflection of her character not of your body. Are you able to have distance from her?

Here's some thought-flipping for you:

My body is just as valuable now as it was 5 years ago. My body has been with me day and night keeping me alive through all my struggles and I am grateful for that. It is not my body's fault that I gained weight from medication...my body was responding in the way it knew how to do and that is okay. Slowing losing some weight could be good for my health. But my self-esteem is separate...my self-worth is intrinsic and unrelated to the # on the scales therefore I love myself every day regardless of my size/weight.