Thanks y'all--I agree that it's important to get a lot of different stories out there and I'm really glad to see the variety here.
A really important point for me was learning the word cis, because that was when it started to click for me that that wasn't what I was. I'd felt disconnected from my body, my name, social expectations, and so on for years, I knew what trans was and I was friends with a trans guy, but the dots didn't really connect. Most of what I heard about trans folk was the trapped-in-the-wrong-body, always-known-since-preschool, born-with-a-birth-defect narrative, and while elements of that occasionally resonated with me, that just wasn't what I felt. But sitting in the room getting the rundown on terminology and trying to fit the word cisgender onto myself just didn't work.
Sometime later that year, I was at soccer practice and I was talking about trans people in a third person, I'm not trans kind of way, and my friend (a trans guy) sort of matter-of-factly told me I was trans. I immediately told him no, not at all, and he explained that he meant it in an umbrella term way and I should go look it up. I thought about it on and off for a while, and then one day when I was chilling in a public library I found myself in the queer section, I picked up a trans book for kicks, and for the first time started to recognize parts of myself in some of the stories. I went back to my friend and told him that I was maybe kind of a little bit possibly trans in the umbrella sense of the word.
But then I didn't really do much with it, in terms of thinking through who I was and what I wanted, because I had tons of other things to deal with for a few years. When other things started to settle down and I started being able to handle them in healthier way, I noticed again that nothing had gotten better about my gender. That was another turning point--I had been presenting in a pretty masculine way for years, and I was increasingly unwilling to apologize for it, but with more mental space and a lil more maturity, I started paying more attention to how deeply set the dissonance with my body was. It feels like I then spent forever just trying to work through and process everything and make sure I was really sure that I was trans, but actually there was only about a year and a half between then and making my first appointment to work on getting T.