I don’t know what I am anymore and I need to get this off my chest.

I’m not someone who trusts themselves very much. I deny that I’m “really sick” or just faking to skip school, etc. When it comes to my gender I’ve had an idea that I’m most likely nonbinary for approximately a year at this point. Yet, I’m doubting myself. I’m not sure if it’s the internet, a generally unsupportive environment, (my parents are allies generally, but don’t believe that nonbinary people exist), or just myself being insecure, but I just want to know if others feel/have felt the same way. For context, I am out to 1 irl friend and a few online friends. The things that I think of are:
- I’m doing it to fit in with my lgbtq+ friends
- I’m doing it because it’s popular
- I didn’t feel uncomfortable necessarily when I was younger, and only feel uncomfortable sometimes now
- Most people I know say that they knew since they were really young, and I didn’t
- I’m at a point in my life where I’m figuring out my identity, and this is easy to latch onto. ( this one is overheard from my parents. I know this isn’t true, but I still worry.)

I’m just worried that I’m wrong. Is it normal to have this many doubts?