If you are a cold hard analytical type, doubts are a way of life. Such was the case for my wife some nearly 30 years ago when she was on the cusp of her GRS. With a good 7 years of living full-time, a look, a body, and a life most of us would be envious over she had "Doubts". She suffers from the same affliction I have. Possible solutions come readily to mind for just about every and anything in the universe. Except for one very minor, insignificant exception. Ourselves.
It was an an exhausting 2 weeks or more. She stayed over in my apartment. After an intense day for me at work, then came the thought experiments, the debates, the What If'ing the universe to death with the two of us exchanging roles, playing Devils Advocate, as well as Cheer Leader. There was not one single aspect that did not receive the "Beating the Dead Horse" award.
At the end of this she left to go back to her place in NYC. Her last words were I don't when, who, or if, you'll ever hear from me again.
Today, some 30 years post-op, there is the occasional rumblings of De-Transitioning. TBH - A lot of times she has some damn good arguments.
Also today - Some 7 years post "Dropping the T-Bomb" I have doubts about myself. What I truly
Need vs what I want vs "In an ideal world...." to this is insane. Stop the HRT, you're feeling "much better now

" I simply want to be "Normal". Like her, I analyze and "What If" things to death. My day job pays me well to do that. It only took a few totaly life disasters and a few years on HRT to get me to apply a portion of that skill to my own life.
Some day I may actually totally embrace what "Normal" is for me. Until then, I'll have doubts. Perhaps even after.
I've seen it happen before