[edit] I just typed out this entire reply before realizing that I just misread your entire post. Even though you say you're already transgendered though, I still want to put this out in the open because I feel as though it's important. :<
You're only 4-5 years older than me, so I'd just want to say this:
When I was on the younger side of the teenage spectrum and I was a little freshmen, I came to the conclusion that I wanted to be the other gender and I truly wasn't my 'real' gender. I already had issues with this when I was little as well. But after about a year of thinking on it... it just really wasn't the case at all. At least for me. Even after asking around, it seemed like most people I knew in that age felt the same way too. I mean, I understand you're older than that but it's still relevant I think.
Without going into too much detail for personal reasons, I implore you to seriously just think on it for a while and don't do anything too drastic until you are absolutely 100% sure that this is truly what you feel. Because once you start that surgery, you can't go back. You'll be sterile as well. You may find that to be either a good or bad thing, but my point is that it's a huge change to go through. Please be careful.
I also hope you were serious and that I didn't just take a joke seriously. I can't detect humor right now.