If you are afraid to get fired, then don't, they don't usually do that especially to European or American employees.
If she said bad things about you, they should interview first to ask about those things and then you can tell them what she did to you, so they might keep you with her or they might assign someone else for you to work with.
Maybe because of you still young, so you still haven't enough experience with the work environment and such bullying people, they are everywhere, just have the courage and reply back to here, don't let her think you are weak, you are young and have nothing to lose (I believe).
It is sad to hear such stories, you are not the only one dear.
In order to help you, you need to tell more about your job, the nationality of your employer ...etc
Just keep in mind, suicide is not optional, think about your family and the big losses and the sadness they will have.
