I completely relate to your post, except I told my wife before we married. I thought I had it under control and I had made peace with myself that my boat had sailed... a million excuses why I shouldn't transition. Except my dysphoria began to get really bad last year, and it gets worse every single day.
The only thing holding me back at the moment is my lack of employment. You shouldn't give up so lightly on your vocation. Galatians 3:28, Mark 9:42-50, Genesis 1:27, Matthew 19:12, Isaiah 56:4-5, Acts 8:36-39 and not being religious myself, I am sure there are more passages you could read that will confirm your faith that I've missed.
But my wife rejected it, then out of the blue she accepted it, then she said that I was probably lying to myself because she didn't see anything female in my character - which, contradicted what she said when I told her before we married, then she went back to denial again, then she tried a couple of times to blackmail me by using my daughter against me... and so on.
Honestly, I've no idea if my marriage will survive or not. It is a difficult situation because my wife is Japanese and we married in Japan... and the laws over there are barbaric. But I hope it does survive. It is has been platonic for some time now.
While your wife blames your therapist, mine blames the support group I attend. I simply explained to her that without the support group then there would be a significant chance that I wouldn't be alive now. The only thing holding me to life at the moment is the love of my family and the possibilities and support my local trans group provide... without those two factors, to remain in ignorance and denial of my self... I am not suicidal, it is just I don't know for how long I can withstand the dysphoria if I didn't know there was help.
I explained that to my wife and that worried her. We've not had a chance to discuss things further. She claims that if it were not for my daughter then she would be fine with it. I am not sure she would be... I hope she is because that is a bit of hope.
Ultimately, it is the fear of the unknown that is holding us back. Everything is a 'what if?' and we will never know unless we take a leap of faith and step forward, hoping that others might show us compassion even if they don't understand.
It is scary and frightening for us because we've hidden it for so long. To take that chance. But our partners and families have not had the years of torment we've faced, for them it is out of the blue. It takes time for them to come to terms with it, and they may never do. But we have to show resolve and commitment, or we can never hope that they will take us seriously.
Now admittedly, some of those words are not my own... and that's advice I need to keep reminding myself about each time I take a small step forwards. I am waffling now... so I hope there's something in that which is helpful. I do find that the dysphoria is sometimes replaced with euphoria each time I manage to overcome my self-doubt. Not doubt about being transgender, but doubt about what to do about it. I care about my family a lot, and I hate to see my wife cry and find it difficult... I would do anything to make it stop for her sake, but that's not possible anymore, it is no longer in my control. The choice now is transition or guess how long I can bare the dysphoria before I eventually end it. And I told her that... because if nothing else, I will always be honest and truthful to her. I just hope that she realises the respect and love I have for her to be open with her about these difficult issues.
Good luck