I'm going to talk to my mother about an argument that we've been having
What do you plan on asking her when you talk to her?
I want to know what she is always trying to be so controlling of me.
It is good to tell other people how you feel and confront them. It might help to be kind so you do not have a bigger argument and fall out.
I am going to point out all the things she's done wrong and then walk out mad.
I think you should instead really try to hear her out. If you are going to let her know how you feel, you should also try to understand how she feels. It is great that you decided to ask for advise during your time of stress as well.