I miss my old life and haven't found any happiness in being a mother and wife.
Did moving make you feel any better?
Not at all, I was happy in my old life, but moving to another country changed me.
I am sorry.  Sometimes you will make choices that you wish you hadn't.  It is best to move on and find happiness.
What did I do wrong?
You did not do anything wrong, you just realized that the choice you made did not make you feel as you hoped. Everything mistake is a lesson, so finding out why this new place is making you upset would be the first thing to do. It is only human to regret decisions everyone once in a while.