Wrongful termination?

I work as a CNA in a rehabilitation/nursing home. I reported a co-worker, a RN for sleeping on the job. In retaliation, she made false accusations and wrote me up. Now I have been told I have to change shifts or I cannot work there anymore. I currently work 3rd shift, they want me to go to 1st or 2nd. I am completely unable to work either shift due to transportation and child care issues. Is there anything I can do?