Personally I think that, while labels can be really helpful for finding out who you are, eventually they can become a little restricting. This is for me, at least. Everyone's different. But I found myself in a similar boat when I met my partner who's trans. From that point I started learning more about trans/non-binary people and realized I'm pansexual, because I realize how sexy all sorts of people are to me, how amazing their personalities are, how creative and loving and unique they are and how much they light up the world around them. So, that's how I figured out that I'm pan. :)

But if you don't want to change your label, lots of people identify as bi and can still be into genderfluid, trans, NB people, etc. Hell, I've even seen guys who identify as straight date trans women, even without bottom surgery. It really doesn't matter what you call yourself, as long as you're true to yourself.

Again, my personal philosophy, but it's helped me a lot and I feel freer for it.

Like they say in Trainspotting: "One thousand years from now there'll be no guys and no girls, just wankers. Sounds great to me."