I returned from FMLA/maternity leave to find that my job had been given to the individual backing me up. Upon talking to my manager, he informed me that I needed to start looking for different employment because I'm going to be laid off (HR would contact me with exact details of my layoff in 2-3 weeks of him informing me and that he was doing me a favor but pre-informing me). I work in a large tech firm with a 1000+ employees. as far as I can tell, 2-3 additional individuals were also asked to start seeking different employment and the manager has decided to leave the company as well with the team getting restructured. What rights or protections do I have in this case?