Aaaahhh.....mothers. Many a therapist have someone's mother to thank for their lucrative careers. I know that, despite my best efforts, I am also going to help keep the psychotherapy field alive and well once I'm done raising my own children.
It sounds like part of the issue is cultural. I am in the US, but come from fairly recent Italian immigrants, so I understand the importance of family loyalty. You have done what was expected of you as your mother's child and it is perfectly justified for you to feel hurt by her actions. It does sound like it is time for you to find a way to follow your dreams, despite what your mother thinks. Can you work in a bakery to earn money to eventually go to pastry school? Are there apprenticeships available there that you could work through for a while? It may be time to just put yourself out there and make this happen for yourself. With all due respect, it sounds like it may be your mother who needs the psychiatrist.
Good luck in your endeavors.