All right. First of all, do you like your nose? Are you
satisfied with it?
If the answer is yes, then don't go for the nosejob! It's your
nose, not her nose! If she doesn't like it then it's just too bad.
Remember that it's you who would have to live with that nose for
the rest of the life, not her. Tell her that too.
Secondly, how independent are you? Are you financially independent?
If you are capable of it, I would suggest you moving out. If not,
just stay on because you have no choice. Shut your ears up to your
mother.
Now, even if you are all that she said you are (which I do not
think is the case), she shouldn't be saying all that. You of all
people, need to understand that what she has been doing to you, is
nothing more than ABUSE. She abuses you mentally, emotionally and
verbally. Abuse doesn't just come in the form of physical violence.
The fact that she had destroyed your self-esteem so much to the
extent that you are going for the nosejob tells a lot.
Next time she comments about your nose again, tell her that your
nose might not be as pretty as hers, but at least your heart is
definitely more beautiful.
Btw, tell her that what she had been doing is nothing more than
abuse. If needed, threaten her with it. You do have the right to
charge her over it. No parent have the right to do what she did to
you. Also, remind that she either have to accept the way that you
are, or pretend that you are not her daughter, since she's so
ashamed of you or something?
Stress is NOT an excuse. Shame on your mother.