As long as you are in her house living, there will be friction. I think you need sit down with your mom calmly and explain that you are concerned by her actions and set some boundaries you both can agree with and work with. If she screams, yells, tries to provoke, etc. Just sit there calmly until she is finished and continue with your conversation. In my experience, people do those things because they work. When they stop working, they stop doing them.

In this approach, you are respecting her, her rules, and getting what you want, all while showing her that you are an adult and can handle situations.