I had the exact reaction as you. And my mom was happy for me and wanted to celebrate with me and talk to me about it. I wanted nothing to do with any of it and I certainly didn't want to talk about it. I was never ready and mourned the changes in my body.
Pregnancy and post-partum were similarly difficult for me. Change is hard and having to process all of the physical changes was difficult and emotionally taxing.
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The phone ping from a pillow fort in a corn maze
I don't have a horse in your war games
I don't even really like horses
I like wild orchids and neighbors with wide orbits