Admitted to plagiarizing (second misconduct), and afraid of expulsion. In need of advice Important note: This was not the first time I was reported for academic misconduct. The first time was when I cheated on an exam for another class. I disclosed how I cheated and accepted the punishment. This time, I told my professor that I didn't intend to plagiarizing but ended up doing it in the end. 

During my meeting with my English professor, I told her that I wasn't feeling well at the moment and when I was completing my final assignment.

(Background) Over the weekend, everyone was able to start on our final assignment - travel piece - that was due Wednesday. On Sunday, I had time to travel. Monday, I hit my head, thought it was nothing, but decided to lie down soon after it happened to forget the pain. Slept all the way up to Tuesday afternoon, went to the very last English class and worked on the final assignment in-between naps to get my mind off of the headache. Vomitted a little in the bathroom, had a hard time concentrating and thinking, maybe I over-ate before I left home. While I was working on my essay, I and other classmates were reviewing each other's works and researching on the travel destination we wrote about. In my notes, I mixed up the info I got from articles with my notes. Didn't properly cite all of the info yet, but wrote down general comments on some of the paragraphs saying which websites they came from. After much editing later, my words and words from the articles were mixed up. Yes, I f'ked up terribly. Went home, slept. Wednesday, I went to the medical center after I felt a head bump while sitting in the passenger seat. The doctor said that I had a minor hematoma, and needed to rest for at least two weeks. E-mailed the professor about that.

(Fast-forward) I admitted to plagiarism, and described what happened and why. The professor didn't take notes of my account when she was going to file a report. On top of that, she just emailed me about something that I already told her right after filing the report. Either she wasn't listening or my story seems really bogus. Right now, I'm scared of what my professor wrote on her report because she might not have mentioned anything about my health, and make it seem like I had plagiarism in mind. I might get expelled over this. I have a printed receipt of my doctor's visit. I don't know if submitting that to the academic misconduct council will help prevent expulsion from happening.
Consider asking to meet with your Professor (e.g. during reception hours). At that meeting, or by email if you can't schedule a meeting, ask her for a copy of the report she submitted. Alternatively, ask the disciplinary body if a procedure has been opened involving you, and if it has, ask for a copy of the complaint through there. If your Professor asks what you need it for (which she shouldn't, it's obvious) - tell her that you're anxious and it's important for you to know how your story was reflected to the higher authorities, given that it involves all sorts of circumstances and details.

This may not solve any of your problems but at least you'll know what you're up against better.