Doubt is normal

There will be plenty of times that you doubt your transition (no matter the type) but this is not because it was the wrong thing to do. It is because you are human which means it comes with the territory. 

You have largely removed yourself from the euphoria/ dysphoria roller coaster and everyday normal life gets to be routine. 

That doesn't mean your existential angst goes away.That's permanent. 

Little things will go wrong which will then get lumped in with your being transgender which is perfectly normal. 

What would be abnormal is if you never doubted at all.