Hi
I am so sorry you are going through this! I am not sure how the legal situation is in your country. I had a bad experience in the US and I learned a bit about it. Keep records of everything. Print emails and store them. Keep a log with all what she does to you, write down sentences, words,how she made you feel, date, place and who were with you at the time of harassment; start going to a psychiatrist or a psychologist to document how this is affecting your psyche, get legal advice, read about work harassment and know your rights, when you are informed about your rights and legally advised, then talk to your supervisor.
To me the process was awful and when I got out of it, I started with a depression I am still fighting. I know I had a condition before, after that the following jobs put a lot of stress on me, etc, but definitely this event made things worse, it was too stressful. Try to get help, the sooner, the better.
I wish you the best