I have an anxiety disorder, for which I take medication and receive counseling. I work as a paralegal in a big law firm. My old supervisor was very organized. We had a weekly meeting to discuss progress on cases, she was very clear on assignments, and she gave me notice well in advance of any meetings I had to attend about cases. (I sometimes have to present information at these meetings, and my anxiety can become overwhelming unless I have plenty of time to prepare.)
Now I have a new supervisor, and it's a disaster. She comes in my office all of the time to talk about different cases and give me assignments. She sometimes springs meetings on me at the last minute, once asking me to pinch hit for a coworker when it wasn't even my case. I've tried to tell her that I need clearer instructions and more time to prepare for meetings, but she just says I need to adjust to her style. My anxiety is getting so much worse; can I ask for a different supervisor?