My wife was let go by the Federal Bureau of Reclamation when she broke her wrist badly. She required surgery to repair the break and was off for almost 3 weeks. In the mean time, they split up her work duties among the other employees. When she returned, they told her they would not need her past the end of her contract which was supposed to be renewed for another 6 months. Employers can and do respond to injured workers in bad ways. Hopefully, your Labor Board can help.