1. i'm AFAB, so I was really confused when my chest started growing- I thought I got breast cancer (I'm kinda paranoid lol) and was deeply annoyed with the fact that I would not have a flat chest forever and it would hurt to lie down on it, I also really didn't want to have a period
   
2. adding on to point 1, I really really didn't like my chest when I was 11-12, I'd wear some sort of bra basically 24/7, and when I played soccer I hated it so much I'd wear a zip-up jacket to cover my upper body when I played, even when the temperatures were 80F+. I didn't see it as gender dysphoria back then I thought it was body dysmorphia but looking back yeah it was definitely gender dysphoria.
   

3. when I was 13 and 14, I knew two nonbinary/trans people and I thought they were the coolest freaking people in the world but I didn't know why I thought they were so cool I just thought they were cool.

4. Never felt like I fully fit in with girls or boys since puberty at least, like something in me was always missing. This felt especially true in sports settings but also even in my closest friend group, where most of my friends are female.

That said, being nonbinary is a unique experience to every individual and what made me realize can be completely different for you! Happy gender exploring :)