Am I Overreacting? My little sister recently lost a lot of weight and she's been putting me down because of it.

So, for context, I'm diagnosed with pretty severe clinical depression, and it makes me extremely unmotivated to do a lot of tasks. Recently my little sister lost like 15 pounds, and I was happy for her and everything because she felt less insecure about being a bit chubby before. However, I've been noticing she keeps making snide comments to me regarding my food intake and how much exercise I get. I tried to explain to her that I would exercise more, I honestly just don't have the energy and motivation to do so. Nevertheless, she keeps telling me to work out, saying I'm going to get fat if I don't eat better, and commenting on my body. Recently she even said I was overweight, when I'm only around 60 kg and 5'3 (which I'm pretty sure is average?). I'm wondering if this is just some average teenage thing and I'm overreacting, or she might be projecting onto me to make herself feel better. Any advice is appreciated.