I was verbally assaulted by 2-Co-workers, I filed Cease &Desist Orders against employees & to employer.

I am a Caucasian female, Gay & have recognized Disabilities under ADA. In October 2013, I was Assaulted verbally, felt very threatened by 2-Co-workers who got so close to my face , I could see their nose hairs. I was taken off work by a psychiatrist for Stress, Anxiety, etc. Related to the situations. There has always been underlining tension with one employee as she is a bully, she has called me a "Snob", during meeting w/Former Supervisor. I have been off for 6-months and just Returned to Work on 5/27/14. Since then, I have been ostracized by the Team and my Supervisor, I have different procedures than the other nurses on my Team. Supervisor said "They don't want to talk to you and I'm not going to force them. This is my solution to the problem." The environment is causing me to lose sleep, unable to eat. HR, The Company are all aware of the Assaults and the current environment.i also have Medical Restrictions which they are not meeting. Can I sue my employer.