You've already got a ton of great advice, and it sounds like your next steps are lined up, so I'll just throw in some words of encouragement and further reading in case you're interested.
Since I had my moment of realization, the mindset I've tried to stick to is "the only way out is through." For me, at this point, that means transition, but it doesn't have to - that's up to you. The reason I bring it up is because it's very easy for this kind of thing to be derailed by the complexities, distractions, and dramatic events of regular life - especially if you turn out to be repressed and looking for excuses to kick the can down the road, like I was. You will likely benefit from sticking with it, in the sense of really engaging with this question and carrying through until you find a satisfying answer for yourself, whatever that answer will end up being. If you are transgender, delaying it will only mean coming back to it later in life, after having suffered needlessly. And if you're not, there's no harm in having taken the time to know yourself a bit better.
I'd also like to share some links that were instrumental to me getting through the questioning phase to the other side, in the order I encountered them.
- These two are related, and are about symptoms of gender dysphoria that are not obviously related to gender. Since you already read the Gender Dysphoria Bible, it probably won't be news to you.
- This one paints a vivid picture of the kinds of experiences you might have had growing up if you happen to be a trans woman who likes women, and really drives home how it's possible to grow up without realizing you're trans. It did a lot to help me recognize myself in trans stories and really see it as a possibility.
- This one gives more of a logical/philosophical argument that helped shift my thinking in terms of the possibility of being trans.
- And this was the killing stroke, as it has been for so many others. The link is just to page one; to get the full story/effect you need to click through for the whole conversation that follows.
Hope some of that helps, or is at least interesting.
Tangential, but since you asked...
Turns out "nervosity" is a word in English. It's used so rarely, though, that I had to look it up to be sure. What you wrote was perfectly correct, but in that context, most people would probably say something like "nervousness" or "anxiety" (at least in my U.S.-centric experience).
For the record, having learned it, I now like "nervosity" better, and (unless I forget, which is likely) intend to start using it.