Don't cry... Contrary to many beliefs, a "break" (or "passagio") in female voices isn't that much higher than it is in male voices. Passagio of a high tenor voice is about on the same note as a passagio of low alto voice. However, how a singer approaches this break, is very different. Partly because of anatomy and vocal apparatus as a whole, but partly also because how we have learned to use our voice. It's about unlearning the male pattern (in this case of MTF singer), and learning the aspects of female singing. This is up to you, and this is what you can change. You can't change the size of your throat, or the shape of your mouth cavity... but a glottoplasty surgery can alter the length of larynx, which can be additionally to altered base speaking frequency, benefitial for lighter quality of your voice, which seems like it should be instantly helpful for singing in and around the area of passagio. But there are no guarantees and promises with this kind of surgery, that you will come out as having more feminine singing voice. It will likely reduce the volume and power to some extent... and if you are now easily able to sing above passagio area with strength and power (for example if you are classically trained opera singer, or you are a trained rock singer), that will likely be gone, as you wont have the same capability to produce that kind of powerful voice (99+% of women also dont have that kind of power.. but its just something to keep in mind..).
Here it's very nicely described and demonstrated (the above mentioned difference)