I'd add that I have said many times to my friends thaty being Trans is a hell of a lot more difficult than than being Lesbian, Bi or Gay, even if you don't take hormones or have breasts or don't want GRS, you have to live with two different identities. I found this to be ever increasingly difficult, you also look completely different from your CIS self, and others can notice it and make nasty comments etc.
OK after a while on hormones your features do change to be more femme (or male as the case might be), but then you have to do something about beard growth (electrolysis in my case, and it hurts), also your voice needs to be different to your cis voice. You also need to acquire the confidence to be able to present in your Trans gender everyday, not just now and again, but every day and still be capable of doing nearly all of the things that you did in your cis gender, the list goes on and on.
Some of us have a head start over others of us, when their cis gender and build is closely matched to their trans gender, (I had to really work at it, and it's still ongoing)..........
So yes I agree with Karens doctor, it is in my opinion one of the hardest things that I could have done.
Cheers
Eve