I am 35 weeks pregnant and been put on bed rest for pre-term labor. Can my employer legally fire me?

I have worked at this company for two years now and they have known the last 8 months that i have a baby on the way. Other employees have been allowed to come in and roll silver wear so they could stay on the pay roll. Now my general manager is refusing to let me do the same, is this right? Also he has already taken me off the schedule and its only been a week since i gave my doctors note and proceeded with hiring two new servers. The restaurants is located in Illinois but my manager says they go by Indiana laws, how can they do this?