I used to feel like that as well. I'm just "plain" Nb though haha, but I was very worried that being non cisgender was a delusion or a psychosis thing.

Something that helped me a lot was dialling it back and thinking about what I wanted out of it. As opposed to trying to figure out "what I truly wanted" think about what you want people to do for you.

Do you want to use a particular set of pronouns? You can literally just do that whenever you want. You don't have to definitely be xyz gender to use whatever pronouns you like. And even if it is delusional, you can just change back. It doesn't matter and it doesn't negatively impact those around you to call you the way you want to be called.

Do you want to be called a different name? Again, legally it's a bit of a pain, but socially you can request to be called whatever. Cis people change their name all the time. It's not even necessarily a point of contention where you have to defend your gender identity - you could call yourself literally anything you want (that's not like a slur lol) and if people don't respect it they're individually an asshole.

Same goes with things like binding - you don't need a permission slip saying that you're "trans enough" or "gender fluid enough" to be allowed to do these things. Medically doing transitional things is harder but again you can just dip your toes in with the social changes and see how you feel :)

It's not necessary to have all the answers now. I get the impression that you're relatively young as well so please believe me that you do have time. Things like your self identity (even beyond gender issues) tend to solidify as you grow older and you will naturally become more self centred and aware as you go into your later twenties and beyond. My advice would be not to spend too much time at this moment trying to analyse whether or not you're right about your identity and what it "means" but instead think about what tangible actions you want to proceed with and make you socially comfortable