I have been through something similar myself. I resigned from the job, even though I could have stayed, or at least fought for my rights. But I was not well enough to cope with any of that, and in the end I realized that I just had to get away from a very toxic environment. What I learned from it was that sometimes your health comes first.
On the other hand; it is important to not let people get away with exploiting and mistreating workers. And on a personal level it is important to stand up for oneself. Empowering! I think you should do what you can to figth back, but ONLY if you feel that you have the strength to do it. That is a desition only you can take, because only you know the limits of your strength. I am sorry to hear that you are going through this. It is the most frustrating thing in the world to deal with bad bosses. From reading your story it sounds to me like you can back up your claims if you deside to go ahead and file a complaint. And like Ripose said, at least just so that your employer has it on her record. Best of luck to you!