That
was you! Why do you imagine you can radically change your circumstances and your feelings/knowledge/beliefs/thinking will instantly change too? We have to learn
everything and think of what you have learned all those years in the ghetto?
I am reminded when I married my husband and would go to the ATM and instead of the $3.46 remaining/available as it had been when I was working and living hand-to-mouth, it would be 1000 times that?

I know just what you mean when you say you feel like an impostor.
I don't know how long you have been married; I have been married 22 years now so I'm getting use to having enough and being on vacation for an entire month, not thinking about how much items on a restaurant menu cost, etc. It takes some doing though, trusting one's own judgement (my husband had to remind me I have good judgement and I had to go on his opinion quite awhile before I would wholly rely on mine) and taking the time and effort to realize that "where" we are is where we are and not a personal statement of where we "belong". You are the core, not the lifestyle! Or, as my favorite saying puts it, "I'm the right size, it's the pants that don't fit!" :-)