You gotta draw the line, and make a hard stand. And you gotta be cold.
Growing up my parents were very controlling as well, not as controlling as your mom seems but still enough for me to not put up with. So after some planning I left without telling them I was leaving or where I was going. Didn't talk to them for 8 months. When I came back I made it very clear that I didn't need them in my life, and if shit didn't change they wouldn't ever know their yet to be born grandchildren.
I now have the best relationship with my parents that I've ever had. In my opinion, controlling parents think that their kids can't navigate life without them. So you gotta prove her wrong. Cut her out for a while and make it very clear that you can exist perfectly fine without her, and she will realize how hard it is for her to exist without you.
Growing up my parents were very controlling as well, not as controlling as your mom seems but still enough for me to not put up with. So after some planning I left without telling them I was leaving or where I was going. Didn't talk to them for 8 months. When I came back I made it very clear that I didn't need them in my life, and if shit didn't change they wouldn't ever know their yet to be born grandchildren.
I now have the best relationship with my parents that I've ever had. In my opinion, controlling parents think that their kids can't navigate life without them. So you gotta prove her wrong. Cut her out for a while and make it very clear that you can exist perfectly fine without her, and she will realize how hard it is for her to exist without you.