Am I overreacting about my sister's comments?

As-salamu alaykum, I recently started wearing the hijab and, inshallah, I'll mark a year next month. It's been challenging as someone with a fuller figure who still works out, but my heart really loves wearing it. For background, I’m 20F and my sister is 27F; she doesn’t wear the hijab and never has. Our relationship has always been a bit rocky, and I feel it’s gotten worse since I began wearing hijab. At first she would give advice about what I should wear and cover, but over time it turned into hurtful remarks about my body. I’ve made changes - full coverage and looser clothes - yet I still feel ashamed, especially when I see other hijabis. That guilt sometimes makes me wish I could just escape my own body and feel more modest. Today we were at a store and a man walked past and made a disgusting comment about my butt while telling me to move. I was stunned and didn’t process it at first, and then my sister started laughing and said, “I knew he wasn’t talking about me,” and immediately told me to cover up again. I told her how much that hurt and asked her not to bring it up, and she apologized, but then brought it up again half an hour later in front of our brother. I lost my temper and she dismissed my feelings and called me weird for still being upset. I try to be strong, but these comments about my body get to me. It’s especially painful when someone as close as my sister, who should be lifting me up, instead chips away at my confidence. I’ve never criticized her body and I try to support her when she shares insecurities. Alhamdulillah our mother wears the hijab and has always been supportive and never invalidated me. I’m looking forward to moving away one day so I won’t have to see her as often. I know my feelings matter and I’ve tried to understand her perspective, but I’m struggling. Am I overreacting, or is she projecting onto me?