How far can doctors go?

A doctor told me that he had to watch me breastfeed my daughter after I repeatedly told him Im uncomfortbale with that. I felt like I was pushed up against a wall and had no choice. He made me feel like I was a bad mother, and that I was starving my child. Which was not the case. she was failure to thrive, and he just wanted to argue with me. He did not offer another way, he just told me that he was the doctor and she was the patient, and he had to watch her eat. He is the reason I cannot breastfeed anymore.