Is my employer liable for this matter or my co-worker?

I used to be a rehab director in a nursing home and stepped down and worked part time at the same location to pursue higher education; however, another company took over and I was forced to join their organization. They made my subordinate the rehab director and, all of the sudden, I was transferred to several locations without notification. I heard from my regional manager that this coworker of mine was spreading rumors about me and my work ethic and that was the reason why I don't have a permanent location and I'm being sent all over the place. She refused to indicate if I will have work next year or not. She also refused to do an annual review on me as well. I'm afraid that they might terminate me without notification because they did this before. Please help me on this matter