I dealt with most of my mommy issues a few years back. I had it out with her and she admitted that she was jealous of me because I was a better mom than her, that I had it all together and she never did.
I was stunned. Who is jealous of their own successful kid? Shows how much help SHE needs not me.
I did not and will not tell my mom that I was banded. She couldn't handle it. As adult children of controlling parents we do not realize how much power we have. They put us in the child/parent relationship every time they become judgmental, or we allow ourselves to get put in that relationship. As soon as you refuse to be defensive and break out of feeling like you must act like we did when we were kids then we take control.
My mom still is a pain but when she steps out of line she hears it. It's out of compassion for her that I will take time to explain thing to her or still even call her.
Since you've already told your mom I'd suggest setting boundaries. For example, she came to the dr with you and you knew she was going to rat you out. What a better place that a dr office to teach your mom about respect. "I'm sorry mom, you cannot come in to the exam room with me. This is about me, not you." The whole staff would have been on your side with Hippa law and all. Then after your visit you could have had the dr call her in to say " tomato soup is fine". That way she knows if she wants to be a part she must behave.
I'm a firm believer in we teach people how to treat us. Took me YEARS to figure out how to defend myself but damn it if it don't feel good!